[简答题]You must also be ready to devote a great deal of time to training the dog when it is young and give it the exercise it needs throughout its life, unless you live in the countryside and can let it run freely.

[简答题]Besides listening to your opponent, you must also closely observe his or her gestures.

[简答题]The old lady must feel the cold a great deal because she doesn’t go out in the winter.

[简答题]First, you must determine if you are eligible to use a flex-time schedule. The flex-time system is designed for those employees whose jobs do not require them to answer telephones or to be available to the public between the hours of 8: 00 A.M. and 5: 00 P.M. In addition, an employee must receive written permission from his or her department manager.

[简答题]We must insist that you would let us know when you intend to deliver the goods.

[填空题]On the other hand, we must also (把他们看作是有生命的) since they are able to multiply in unlimited quantities.

[单项选择]“That latest car must have cost you a pretty penny.” “Oh, no ,_____.”
A. it didn’t
B. it mustn’t
C. it hasn’t
D. it must haven’t

[填空题]

experience which will also give you a chance to widen your outlook on life,

[单项选择]I must warn you that you may find parts of this article rather difficult to understand. Wait! The sentence you have just read is quite untrue. But that isn’t why you were irritated by it. It was, of course, also insulting and few people enjoy being insulted. By reading this article you are making the claim that you are the sort of person who will understand it; my opening sentence questioned your claim, and that is what made it insulting. In other words, an insult occurs whenever one person denies some aspect of identity which another is claiming, explicitly or otherwise.
When describing the course of a disease, pathologists often talk of the body organizing its defences in response to a biological insult. But in everyday life we use the term only when the rules which govern social encounters are breached in the manner described. For social interaction to work it is essential that the participants respect the "face" of all involved. "Face" refers to the public image which a person
A. To prepare the reader for difficulties
B. To make the article appear very impressive
C. To discourage uneducated readers
D. To demonstrate the nature of an insult

[填空题]What must you do if you smell smoke at night

[填空题]Although we already know a great deal about influenza, it is difficult for epidemiologists (流行病学家), who study infectious disease, to (36) when and where the next flu epidemic will occur, and how (37) 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 (38) that do not spread far through the population. The A and B types are (39) , and are responsible for the epidemics that cause frequent concern. Following any virus attack, the human body builds up antibodies which confer (给予) immunity to that strain of virus, but a virus with the capacity to change its character is able to bypass this (40) . Variability is less developed in the influenza B virus, which affects only human beings. An influenza B virus may cause a widespread but will have little effect if (41) into the same community soon afterwards, since nearly everyone will have built up