While he was about in the street Mary came up to him.A. wanderingB. wonderingC. wondered

问题补充：

While he was about in the street, Mary came up to him.

A. wandering

B. wondering

C. wondered

D. wandered

答案：

(答案→)A. wandering

B. wondering

C. wondered

D. wandered

解析：考查动词。wander是漫游,闲逛的意思,而wonder是想的意思,根据句意用过去进行时。句意：当他在街上闲逛的时候，玛丽碰到了他。

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