The schoolmaster hesitated an instnat before he made the decision.A. forB. inC. atD. on

问题补充：

The schoolmaster hesitated an instnat before he made the decision.

A. for

B. in

C. at

D. on

答案：

(答案→)A. for

B. in

C. at

D. on

解析：hesitate一般接不定式，这里用for an instnat，意思是：一会。