单选题Mary is a famous writer though she is still __________ her twenties.

单选题The writer thinks that parents should try their best to understand their children better.

单选题请根据下面短文回答题 You have probably seen ads (广告) in newspaper or on television for mail-order companies. Perhaps a catalogue (商品目录) has been sent to you. Why do people buy things they have not seen in person? Some people believe that things can be bought more cheaply by mail. Another good thing about buying by mail is that it is easier and more enjoyable to sit at home and work through a catalogue than to shop around the stores. With a catalogue from a large company, you have your own shop window for almost everything you want to buy. Buying from a catalogue is so easy. It saves the shopper time and trouble. Sometimes, it saves the shopper money, too. But people often buy more than they can really afford (付得起) or need, because many things look so good to them. They can probably pay a certain part of the full price - a down payment. Then they pay a certain amount of money every month until the goods is paid for in full. But by then they often find what they have bought are of no use at all.

单选题

单选题

单选题Peter,　John and Tom each ______.

单选题Why is the man feeling bad?

单选题—______ I do the laundry first? —No, you ______. You can do your homework first. A. Must; needn't B. Must; mustn't C. Can; can't

单选题Countless sheep can be cloned from one fetal cell.

单选题The librarian was very proud because _______.A. he thought it was the best job to work in a libraryB. the young man followed his adviceC. the young man didn't like the book about Greek history

单选题Which country has the second ______ population in the world?

单选题There is ______ old bike. ______ old bike is Mr Zhao"s.

单选题 在本节中，你将听到15个对话，每个对话有一个问题。请从[A]、[B]、[C]三个选项中选出答案，并标在试卷的相应位置。下面，请听这些对话。

单选题Mary always got up too late, and never ______ enough time for breakfast.

单选题—Must we finish the work today?—No, you ______.

单选题You must show your receipt ______ you want to get your bag.