The cause he had devoted himself to a perfect success.A. provingB. provedC. was provedD. h

发布时间：2020-08-16 08:00:48


The cause he had devoted himself to     a perfect success.
A. proving
B. proved
C. was proved
D. has been proved

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A. proving
(答案→)B. proved
C. was proved
D. has been proved
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