题目内容

A full understanding of mathematics is sufficient to explain a wide variety of natural .

A. performances
B. performance
C. phenomenon
D. phenomena

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Make sure the label is firmly to the parcel before you mail it.

A. attaching
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A. pick up
B. work on
C. make up for
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The committee a decision from the head office before it takes any action.

A. is awaiting
B. is awaiting for
C. awaited
D. awaited for

The little girl did seem to be frightened of being left by herself in the house.

A. not .... at least
B. not ... in all
C. not..... in the least
D. not ....at most

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