50. The Englishman has a very good ear music. You can ask him for some advice.A. at B. of

问题补充：

50. The Englishman has a very good ear music. You can ask him for some advice.

A. at

B. of

C. for

D. In

答案：

A. at

B. of

(答案→)C. for

D. In

解析：可联系答.案.网客服索取。