Helen was fully occupiedbusiness matters so we didn’t want to brother her.A. forB. atC. i

问题补充：

Helen was fully occupiedbusiness matters, so we didn’t want to brother her.

A. for

B. at

C. in

D. with

答案：

A. for

B. at

C. in

(答案→)D. with

解析：考查固定搭配。be occupied with意思“忙于做某事”；be occupied in后接动名词。