51、 By the time the war__________, most of the people had already left.
A．broke out
B．broke up
C．intervened
D．happen


52、 I don' t like to disturb you, because you' re quite tired__________today.
A．of
B．with
C．out
D．on


53、 The __________flowers were all that remained.
A．two yellow little
B．little two yellow
C．yellow two little
D．two little yellow


54、 We hadn' t met for 20 years, but I recognized her __________I saw her.
A．for the moment
B．the moment when
C．at the moment when
D．the moment


55、 "What's in your hand?"
"It is a__________bill. "
A．two-thousand dollar
B．two thousand dollars
C．two-thousand-dollar
D．two-thousand-dollars


56、 There were many people present and he appeared only for a few seconds, so I only caught a__________of him.
A．glance
B．glimpse
C．look
D．sight


57、 This new instrument is far superior __________the old one we bought three years ago.
A．than
B．to
C．over
D．of


58、 You may __________this; I don' t want it back.
A．get
B．remain
C．maintain
D．keep


59、 Their hesitation means __________the experiment.
A．to give up doing
B．to give up to do
C．to be given up to do
D．giving up doing


60、 If you don' t go, I shall not__________.
A．either
B．too
C．also
D．yet

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