him speak English so fluently and you would think him an American.A. HearingB. HearC. H

问题补充：

him speak English so fluently, and you would think him an American.

A. Hearing

B. Hear

C. Heard

D. Having heard

答案：

A. Hearing

(答案→)B. Hear

C. Heard

D. Having heard

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