问题描述:
He showed great interest in my field of work.He asked me ( )fresh developments.
A to keep him informing
B to keep him informed
C to be kept informed of
D to keep him informed of
为什么选D?
A to keep him informing
B to keep him informed
C to be kept informed of
D to keep him informed of
为什么选D?
问题解答:
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