.My brother is fifteen but he talked as if he the Long March.A. had joinedB. took part i

问题补充：

.

My brother is fifteen, but he talked as if he the Long March.

A. had joined

B. took part in

C. takes part in

D. had taken part in

答案：

A. had joined

B. took part in

C. takes part in

(答案→)D. had taken part in

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