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第1题

He had a hard time_____ French.
A.study
B.studies
C.studying
D.to study
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第2题

This is a lovely_____.
A.piece music
B.music
C.piece musics
D.piece of music
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第3题

Many new oilfields______ up one after another in our country.
A.open
B.has opened
C.will be opened
D.is be
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第4题

His arm was not in a sling, and showed no sign_____ .
A.of having been damaged
B.of having been damaging
C.to
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