58. Though his classmates are all ahead of him he is studying very hard to them.A. catch

问题补充：

58. Though his classmates are all ahead of him, he is studying very hard to them.

A. catch up

B. catch up with

C. catch hold of

D. catch sight of

答案：

A. catch up

(答案→)B. catch up with

C. catch hold of

D. catch sight of

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