We have made a rule in the office.A. this not to smokeB. it smokingC. it to not smoke

问题补充：

We have made a rule in the office.

A. this, not to smoke

B. it, smoking

C. it, to not smoke

D. it, not to smoke

答案：

A. this, not to smoke

B. it, smoking

C. it, to not smoke

(答案→)D. it, not to smoke

解析： 考查it作形式宾语。真正的宾语是 in the office，所以made后面用it作形式宾语。根据句意，应是把不吸烟作为规定，所以排除A,B；且不定式变否定，是在to前加not，所以选D。