We cant put off a plan. Clean--Up Day is coming. A. make B. to make C. making D. to makin

问题补充：

We can put off a plan. Clean--Up Day is coming.

A. make

B. to make

C. making

D. to making

答案：

A. make

B. to make

(答案→)C. making

D. to making

解析：句意：我们不能推迟制订计划，清洁日就要到了。put off推迟，固定短语，后跟动名词，故选C。