单选题The fierce competition in this trade gets______of this enterprise"s development.

单选题The police ______ to emergencies in just a few minutes when the accident happened.

单选题What can we infer from the passage? 

单选题Humans should not develop their economy at the ______ of the ecological environment.

单选题Your headache is likely to ______ if its real cause is not identified and proper treatment should be administered accordingly.

单选题 A Family Left a Waitress 'Lifestyle' Tip instead of Cash A family who didn't tip a waitress on a $100 bill because they didn't approve of her 'lifestyle' may not be welcome back at Gallop Asian Bistro here. A couple dining with their two middle-school-age children Wednesday made their judgment of Dayna Morales, a Marine veteran, simply by looking at her. They let her know what they thought with a scribbled (潦草书写) message on their $93.55 check. 'I'm sorry but I cannot tip because I do not agree with your lifestyle and how you live your life,' the note reads. 'The short hair and clothes just gave it away in her eyes,' Morales, 22, said Thursday evening after she had posted a picture of the check and her own rant(痛骂) on a gay-friendly Facebook page called 'Have a Gay Day.' Her post went viral on the Internet and was picked up by national websites, including the Huffington Post. She said the response has 'put a smile on my face.' Morales said when she introduced herself to the family at the table the woman responded, 'Oh, I thought you were going to say your name is Dan. You surprised us!' Morales didn't respond, but never thought they wouldn't leave a tip. 'You've got to bite your tongue and kiss up (溜须拍马). We live off tips,' she said about life as a restaurant server. She shared what happened online because 'others need to be informed this is still going on'. She said her boss isn't upset with her posting the check—in fact, the family may not be allowed back at the restaurant, which opened about four months ago. 'We are kind of a big family so they all took it to heart. My manager assured me that if they had seen the check before the family left they would have confronted them,' she said. Morales, who lives in Bedminster, N.J., served in the Marine Corps from 2009 to 2011. She once taught preschool with Children of America in New York. Servers have taken their rage at stingy (吝啬的) customers to Facebook and the blogs in recent years, and their online rants track a nice-nasty trend of notes without tips.

单选题What is the tone of the passage?

单选题Artists in the period of Renaissance had the advantage of being able to study Roman and Greek literature and sculpture because ______.

单选题The tallest building in Americas capital city is the Washington Monument纪念碑． It is 21 for George Washington , the first president of the United States． He 22 the American colonies殖民地 in the War o

单选题The meal he served to the guests was rather ______.

单选题In calculating the daily calorie requirements for an individual, variations in body size, physical activity and age should be______.

单选题Mary Robinson has been formally ______ as Ireland's first woman president.

单选题Our research has focused on a drug which is so ______ as to be able to change brain chemistry. A. powerful B. influential C. monstrous D. vigorous

单选题Mr. Brown often (wore) a heavy coat because he was not (used to) (live) in such a (cold climate).A. woreB. used toC. liveD. cold climate

单选题When I try to understand ______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes. A. why it does B. what it does C. what it is D. why it is

单选题We learn from the second paragraph that ______.

单选题 Directions: For this part, you are allowed 30 minutes to write an essay entitled On Self-improvement by commenting on the saying 'There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.' You should write at least 150 words but no more than 200 words.

单选题Difficulties and hardships have ______ the best qualities of the young geologist.

单选题Available research shows that more than half of people who are currently employed are considering getting a new job.