单选题——They haven’t finished the work up to now． ——Well，they__________．

单选题Julia _____two children since she got married in 1990.A. gives birth to B. has given birth toC. has been giving birth to D. gave birth to

单选题Although we already know a great deal about influenza, and although the World Health Organization is constantly collecting detailed information from its chain of influenza reference laboratories throughout the world, it is extremely difficult for epidemiologists (流行病专家), who study infectious disease, to predict when and where the next flu epidemic will occur, and how severe it will be.There are three kinds of influenza virus, known as A, B and C. Influenza C virus is relatively stable and causes mild infections that do not spread far through the population. The A and B types are unstable, and are responsible for the epidemics that cause frequent concern. Following any virus attack, the human body builds up antibodies which confer immunity to that strain of virus, but a virus with the capacity to change its character is able to by-pass this protection. Variability is less developed in the influenza B virus, which affects only human beings. An influenza B virus may cause a widespread epidemic but will have little effect if introduced into the same community soon afterwards, since nearly everyone will have built up antibodies and will be immune. The influenza A virus, which affects animals also, is extremely unstable and is responsible for some of the worst outbreaks of the disease, such as the unparalleled pandemic, or world epidemic, of 1918-1919, when about half the world's population were infected and about twenty million people died, some from pneumonia caused by the virus itself and some from secondary complications(并发症) caused by bacteria.Accurate prediction is difficult because of the complication of the factors. A particular virus may be related to one to which some of the population have partial involved immunity. The extent to which it will spread will depend on factors such as its own strength, or virulence, the ease with which it can be transmitted and the strength of the opposition it encounters. Scientists, however, have a reliable general picture of the world situation. Influenza A attacks us in waves every two or three years, while influenza B, which travels more slowly, launches its main assaults every three to six years. The outbreaks vary from isolated cases to epidemics involving a tenth or more of the population. We may confidently prophesy that sooner or later large numbers of people will be feeling the unpleasant effects of some kind of influenza virus.

单选题Powerful advertisements can {{U}}convince{{/U}} people to buy almost anything. A. persuade B. inform C. tell D. influence

单选题Dont believe him

单选题He appreciated _____the chance to deliver his thesis in the annual symposium on Comparative Literature.A. having given B. to have been givenC. to have given D. having been given

单选题ATTENTION PARK VISITORS As of June 1st, 2006, the Trenton County Department of Park Services is instituting the following rules【K10】______acceptable activities and behavior in Winfred Park: 1. As in all Trenton County parks, the consumption of alcoholic beverages is strictly prohibited. Also, open fires are not permitted under any circumstances. Food may only be cooked using the designated barbecue pits located at each picnic area. 2. Visitors wishing to hold a gathering of twenty-five people or more must first【K11】______with and receive a permit from the Trenton Country Department of Park Services. The cost of a large gathering permit is $10. 3. All minors swimming in Winfred Stream must be supervised by an adult. Please use【K12】______when swimming, as currents and water levels can change quickly without warning. Questions concerning these regulations should be directed by phone, email, or letter to Jeremy Bodo, superintendent of the Trenton County Department of Park Services.

单选题The teacher told us that the earth ran around the sun. A. told B. that C. ran D. the

单选题【2015工商银行】Language teachers often extract examples from grammar books．

单选题I have bought the same dress ______ she is wearing. A. as B. that C. which D. what

单选题The storm caused severe damage.

单选题【2015建设银行】The rules are too rigid to allow for human error．

单选题Mr. Tamil believes that his strategy for increasing advertising revenues will be successful, but his supervisor has requested that he research alternative______.

单选题From: Wayne Thomas [wayne@e-solutions.com] To: terry.giblert@monavale.com Cc: Karen Russell [Karen.russell@e-solutions.com] Sent: Tue, March 07, 2007 14:11 PM Terry, I believe you should by now have received the copy of our company profile that we (21) in our last meeting. In it you will find the necessary information you requested. If you still haven't received it, please feel free to contact me. Anyway, to keep the ball rolling, our Chairman, Mr. Langley would like to have a meeting with Ms. Russell and/or you in Detroit on any date from March 20th to March 24th to have a further discussion on the (22) of our cooperation. Those dates have been chosen since Mr. Langley will be traveling extensively in (23) March and April. However, if our suggested dates do not suit Ms. Rusell, then please let us know your preferred date for the meeting. Best regards, Wayne

单选题Make sure the table is securely {{U}}anchored{{/U}}. A.repaired B.cleared C.booked D.fixed

单选题【2015工商银行】All the walls in the building had the same layout ．

单选题—These boxes are too heavy for me to carry. —Here, I'll give you a hand ______ them. A. for B. to C. with D. by

单选题There are much many more people than I expected.A. ThereB. muchC. manyD. than

单选题LANDSCAPING FIRM We are currently seeking an administrative assistant for landscaping companies located in pine ridge.Responsibilities include answering phones, handling correspondence, and setting up meetings. Must demonstrate excellent customer service skills and computer skills in word processing and spreadsheet software. Marketing background required. This is a permanent position paying ￥13/hr. Please submit resumes to ivy.hermann@beslandscope.com or call 555-0045 for further information.

单选题To my surprise, he made a ______ boat by himself. A.sixteen-meters-long B.long sixteen-meter C.sixteen-meter-long D.sixteen meter long