单选题They repeated the experiment several times ______ they were sure that the result was reliable.A) untilB) forC) sinceD) when

单选题I can't ______ what has happened to the vegetables, for they were freshly picked this morning. A. figure out B. work out C. look out D. turn out

单选题______ we all know, Mary is a very warm-hearted person. A. Which B. That C. As D. It

单选题Thank you for sending us ______ fresh vegetables of many kinds. You have done us ______ great service.

单选题______ leaves the office last should turn off the air conditioner.

单选题Since the redesign of the assembly line, the productivity ______.

单选题______ the opportunity, he might well have become an outstanding leader.

单选题The sentence in the sixth paragraph ”no one could pass on his name" may mean that ______.

单选题Do you still remember the day ______ we spent together in the countryside ten years ago? A. where B. on which C. when D. that

单选题Anyone can borrow books from the library ______ he has a library card. A. since B. so long as C. even though D. unless

单选题Directions: This task is the same as Task 1. The questions or unfinished statements are numbered 41 to 45. The United States has many different kinds of climates. On the northwest coast, the temperature changes very little between summer and winter, but the north central states have a very different kind of climate. In those states, people wear light clothes in summer, and they need heavy woolen clothes in winter. In the southwest coast, the climate is rainy and warm during the winter, but the summer is dry and hot. In the northeast of the United States, summer temperatures are very different from winter temperatures. Summer is usually hot, and winter is usually cold. Spring temperatures are warm, and fall temperatures are cool. Years ago, people in the cold parts of the United States didn't often get fresh vegetables and fresh fruits during the winter. Today, however, trucks and trains carry fruits and vegetables very quickly to all parts of the United States. In this way, Americans "send their climates" to people in other states.

单选题After Jane"s husband died, she suffered a good deal of ______ over the years.

单选题It is necessary that everyone______ a copy of this book.A) hasB) could haveC) will haveD) should have

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单选题It is dangerous to put iron wire in socket(插座). Which of the following explains why this is so?

单选题You ______ to the office tomorrow if you have something important to do.

单选题The large museums no longer accept everything that is offered to them.A．那些大博物馆不再无选择地接受每一件物品。B．那些大博物馆不再长久接受每一件物品。C．那些大博物馆不会接受每一件物品。D．那些大博物馆不会长久给予被提供的每一件物品。

单选题The clock, ______ my great grandfather bought, is still in good order.

单选题Throughout his life, he continued his education, learning from human contacts as well as from books.

单选题In order to rent and drive a car in Japan, you require a Japanese driving license or an international driving permit. In case of France, Germany and Switzerland, an official translation of your home country' s driving license is required. International driving permits must be obtained in your home country, usually through the National Automobile Association, before you leave for Japan. They are valid for one year and must be accompanied by your home country' s driving license in order to be valid. Japan recognizes only international driving permits, which are based on the Geneva Convention of 1949. Some countries, such as France, Germany and Switzerland, however, issue international driving permits, which are based on different conventions. The permits issued by those countries are not valid in Japan. Instead, people with a French, German or Swiss driver' s license can drive in Japan for up to one year with an official Japanese translation of their driving licenses. Contact the respective embassies or consulates in Japan for details on how to obtain a recognized translation. The minimum age for driving in Japan is 18 years.