1.A year later,with the nation 's economy________,Bush' s approval rating dropped below 40 percent.
A. in power
B.in trouble
C.in hand
D.in part
2.There is the appreciation of the salient historical truth_________the aging of advanced societies has been a sudden change.
A. which
B. what
C.that
D.how
3.Robots differ from automatic machines_________after completion of one specific task , they can be reprogrammed by a computer to do another one.
A.in case
B.in that
C.in which
D.in time
4.Basically,these attitudes amount to a belief_________leisure can and should be put to good use.
A. which
B. that
C.what
D.how
5.The professor worked for 7 hours at a_______.
A. stretch
B. extend
C.expand
D. prolong
6.If an earthquake occurred,some of the one - storey houses_______.
A. might be left stand
B. might leave to be standing
C. might be left to stand
D. might be left standing
7._______, he had no time to rest.
A.As he was tired
B.If he was tired
C.Tired as he was
D.Now that he was tired
8.Since we have a focused subject,we should not talk________"
A.at once
B. at hand
C.at intervals
D.at random
9.why do you blame him for his poor judgment on the matter_______ he really needs is encouragement?
A. when that
B. since that
C. when what
D. now that
10.The doctors are_______about the guidelines under which they can carry out euthanasia.
A. at a stretch
B.at a loss
C.at random
D. at length
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