题目内容

Card indexes in a library are ____ to readers.

A. benefit
B. benefits
C. beneficial
D. beneath

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Life seemed all of a sudden empty and ____.

A. meaningless
B. meaning
C. meaningfull
D. meaningfully

The heavy snow stopped him from ____ to our party.

A. come
B. came
C. coming
D. comes

The two groups agreed to ____ with each other.

A. cooperate
B. cooperation
C. cooperating
D. cooperated

The accident is still under ____.

A. investigate
B. investigated
C. investigating
D. investigation