[单项选择]We have been studying German ______ we entered this school.


A. as
B. since
C. while
D. because

[简答题]We inform you that we have been engaged in this business for the past 25 years. We, therefore, feel that because of our past years' experience, we are well qualified to take care of your interests at this end.

[单项选择]Since we have never been here before, we do not know which bus（）
A. should we take'
B. to be taking
C. to take
D. should take

[单项选择]We have been told that under no circumstances______ the telephone in the office for personal affairs.
A. may we use
B. we may use
C. we could use
D. did we use

[单项选择]We have been hearing______accounts of your work.
A. favored
B. favorable
C. favorite
D. favoring

[单项选择]______ for your help, we'd never have been able to get over the difficulties.
A. Had it not
B. If it were not
C. Had it not been
D. If we had not been

[单项选择]John and I have been ______ for years. In fact, we haven't seen each other since high school.
A. out of touch
B. out of sight
C. out of work
D. out of business

[单选题]We’re returning due to burst tyre during _______ retraction, we were lucky it didn’t burst in the well, but post flaps appear to have been damaged.
A.gear
B.flap
C.throttle
D.spoiler

[单项选择]I have been trying to quit smoking.
A. give up
B. pick up
C. build up
D. take up

[单项选择]The plant products have been carefully inspected and are considered to be ( ) from any quarantine pests.
A. out
B. away
C. free
D. far

[单项选择]Americans have been criticized for placing too much （　） on being on time.
A. emphasis
B. activity
C. bother
D. assistance

[单项选择]Major manufacturers have been using "quality circle" with undeniable success for more them two decades.
A. 100 years
B. 20 years
C. 50 years
D. 10 years

[单项选择]The selection says that spiders have been discovered ______.
A. five miles above earth
B. more than 2000 feet underground
C. everywhere that man has reached
D. both A and B

[单项选择]What actions have been take by the government

[单项选择]Their relationships with their parents have been so ______ that they are no longer able to communicate.


A. restless
B. distant
C. tight
D. strained

[单项选择]Several scientists have been sent to that forest to ______ the wildlife there.

[单项选择]

The 1990s have been designated the Decade Against Drug Abuse by the United Nations. But, (1) less than three years to go before the end of the decade, governments and health organizations (2) that they have made (3) progress in reducing drug, alcohol and tobacco abuse. Today, consumption of all these substances is increasingly steadily worldwide. (4) every country now has problems with (5) drugs. And the world is producing and consuming more alcohol and tobacco than ever. Between 1970 and 1990 beer production (6) rose by over 80 per cent. And, (7) the number of smokers keeps on (8) ,by the second or third (9) of the next century there could be 10 million deaths each year (10) smoking related illnesses.
Drugs are also a huge burden (11) the world economy. In the United States, for example, it’s estimated that alcohol and illegal drug use costs the country tens of billions of dollars each yea
A. by
B. about
C. with
D. from