He has a good command maths and plays an important part our team.A. about; inB. of; toC.

问题补充：

He has a good command maths and plays an important part our team.

A. about; in

B. of; to

C. to; about

D. of; in

答案：

A. about; in

B. of; to

C. to; about

(答案→)D. of; in

解析：have a good command of: 对……掌握很好。play an important role in … 在……中发挥重要作用。 本题意为：他数学学得很好，在我们队发挥重要作用。故D项正确。