We should ______ when we receive a suspicious letter.

From the passage we can see that________

A．officials and students are debating whether they should have free speech

B．in the past decade, people did not have any freedom of speech

C．some students are attacked politically as targets

D．officials and students are discussing ways of avoiding offending messages

Metaphor is applied in ________.

A、…satiety is a dream which will always elude you.

B、When white men first effect contact with some unspoilt race of savages, they offer them all kinds of benefits, from the light of the Gospel to pumpkin pie.

C、Dance halls, cinemas, this age of jazz are all, if we may believe our ears, gateway to Hell, and we should be better employed sitting at home contemplating our sins.

D、It is scarcely possible to exaggerate the influence of vanity throughout the range of human life, from the child of three to the potentate at whose frown the world trembles.

A. Whenever

B. No sooner

C. In case

D. Once

A.in the position of

B.because

C.At the time whe

D.the thing that

We have reached a point ______ a change is needed.

A. where

B. that

C. which

D. when

A.A.how

B.B.that

C.C.which

D.D.what

听力原文：Who turned off the photocopier？

(A) We copied the photos.

(B) I turned it off when I finished.

(C) The photographer turned in the photos.

(34)

A．

B．

C．

听力原文： Sugar is so much a part of our modern life that we only really think about it when, for some reason, we cannot obtain it. It has been known to man for at least 3,000 years, but has come into common use only in modern times. Until quite recently it was considered as a medicine and as a luxury for the very rich only.

Sugar is, then, very important to our civilization. But what exactly is it？ Of course, most of us recognize sugar immediately as the sweet material that we put in coffee or cakes. This common form. of sugar is derived from two plants: the sugar cane (a type of grass which grows to a height of twenty feet) and the sugar Beet (which grows underground). But there are in fact many types of sugar, and the chemist recognizes hundreds of different varieties, each coming from a different source.

About 90% of the sugar is produced as food. Only 10% is used in industry for purposes other than food production. Yet sugar has great possibilities for use as the basis of chemicals. It can even be used for making plastics. In the future these potential uses will certainly be developed more than in the past.

There are many reasons why we should increase the production of sugar. Most important is that it is one of the most highly concentrated of energy foods. Thus sugar cane and beet produce an average of 7,000,000 calories per a-ere. In this way they have the advantage over potatoes, which give only 4,000,000, while figure for wheat and beans, is 2,000,000 each. So three acres of land growing wheat and potatoes give only slightly more energy than one acre of sugar.

What is the percentage of the sugar used as food？

A．19%.

B．90%.

C．10%.

D．30%.

A、velocity matching

B、displacement matching

C、torque matching

D、inertia matching

听力原文：W: The film will begin at seven o'clock.

M: Oh, it's six fifty. We must hurry.

When will the film begin？

A．At six fifty.

B．At seven.

C．At seven fifty.

A、No one expectede her to buy a car, so we were quite surprised when we discovered that she had bought two.

B、NO one expected her to buy a car, so we were quite, surprised whe we discovered that she had bought two.

C、No one expected her to buy a car, so we were quite surprised when we discovered, that she had bought two.

D、None of the above.