15. Very few people understood this contract, _____was very obscure.
A. the language
B. the language of which
C. all it said
D. which it had said
16. Management often works hard to set up a situation _____work is done in series.
A. that
B. where
C. which
D. what
17. Although Tom is satisfied with his academic achievement, he wonders ____will happen to his family life.
A. it
B. that
C. what
D. this
18. We cannot leave this tough job to a person _____.
A. who nobody has confidence
B. in whom nobody has confidence
C. for whom nobody has confidence
D. who everyone has confidence of
19. Six out of every ten prisoners in chains are black, which is _____ the chain gangs call up images of slavery in centuries gone by.
A. where
B. when
C. what
D. why
20.Robots differ from automatic machines _____ after completion of one specific task, they can be reprogrammed by a computer to do another one.
A. so that
B. in which
C. given that
D. in that
21. His name will be crossed out from the list _____ he makes the same mistake again.
A. if
B. unless
C. because
D. though
22. Five minutes earlier, _____we may have caught the gunman.
A. and
B. but
C. or
D. so
23. _____ I'm supposed to work by myself, there are other people who I can interact with.
A. If only
B. So long as
C. Even if
D. As far as
24. We hope that all the measures against sandstorms, _____ was put forward by the committee, will be considered seriously at the meeting .
A. while
B. after
C. since
D. as
25. You are the best for the job _____ you apply your mind to it.
A. until
B. if only
C. in case
D. unless
26. Einstein claimed that matter and energy are interchangeable, _____ there is no 'absolute' time and space.
A. so that
B. even if
C. in case
D. in order
27. In a sense, men of this kind begin not so much with a musical theme _____ with a completed composition.
A. but
B. than
C. as
D. that
28. You must push away the many temptations that are always present _____ your schedule is useless.
A. and
B. but
C. or
D. for
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