石油华东《科技英语》2013年春学期在线作业（四）

谋学网

一、单选题（共 20 道试题，共 100 分。）V 1.  It was in 2005 _____we began to introduce this new technique into our company.
A. which
B. then
C. when
D. that
      满分：5  分
2.  Scientists have discovered genetic variations that make people more likely to get ______ on cigarettes and more prone to develop lung cancer.
A. retained
B. hooked
C. tired
D. hanged
      满分：5  分
3.  Every country tries to maintain a(n) ______ balance of trade, which assures it of the means to buy necessary imports.
A. organic
B. favorite
C. compound
D. favorable
      满分：5  分
4.  The methods used to achieve these aims will be described later, and ______ can be seen broadly as a focusing on to a target.
A. up to now
B. so far
C. as yet
D. for the present
      满分：5  分
5.  ____ twice, the postman refused to deliver our letters unless we chained our dog.
A. Being bitten
B. Bitten
C. Having bitten
D. To be bitten
      满分：5  分
6.  We must put the ______ side of the policy into consideration to avoid possible mistakes.
A. converse
B. reverse
C. reserve
D. revise
      满分：5  分
7.  When Bob and his friends came, we____our supper then.
A. had
B. were having
C. have
D. are having
      满分：5  分
8.  Over the past decades, sea ice in the Arctic（北极）______ as a result of global warming.
A. had decreased
B. will decrease
C. has been decreasing
D. is decreasing
      满分：5  分
9.  He left orders that nothing ______ until the police arrived.
A. was touched
B. had been touched
C. should be touched
D. was to be touched
      满分：5  分
10.  My uncle's house in the downtown area is much smaller than ours, but it is twice______expensive.
A. as
B. so
C. too
D. very
      满分：5  分
11.  There are two rooms in the house, ____serves as a kitchen.
A. the smaller of which
B. the smaller of that
C. the smallest of which
D. the smallest of that
      满分：5  分
12.  Hearing the joke, all the students burst into ______ laughter.
A. visual
B. long-standing
C. spontaneous
D. contributing
      满分：5  分
13.  For the time being, Philips could not say when such a product as this might be ______ available, however.
A. vertically
B. commercially
C. horizontally
D. rapidly
      满分：5  分
14.  They are trying to ______ the waste discharged by the factory for profit.
A. expose
B. exhaust
C. exhibit
D. exploit
      满分：5  分
15.  By the time he arrives in Beijing, we ________ here for two days.
A. will stay
B. have been staying
C. will have stayed
D. have stayed
      满分：5  分
16.  Thank heavens! You have come back home. You should be thankful that you have escaped with only ______ injuries.
A. minor
B. major
C. significant
D. abundant
      满分：5  分
17.  If it_____tomorrow, we will stay indoors to have our training class.
A. rains
B. rained
C. will rain
D. is raining
      满分：5  分
18.  How many more decades will have to pass ______scientists succeed in providing a cure for cancer？
A. when
B. before
C. since
D. until
      满分：5  分
19.  ______ is she in London than she rings up her old friend Mary.
A. Scarcely
B. Rarely
C. No sooner
D. Hardly
      满分：5  分
20.  You must speak slowly, so that you can make yourself ________.
A. understood
B. understand
C. understanding
D. to understand
      满分：5  分