It’s hard to keep the house with three kids.A. cleaningB. to cleanC. cleanedD. clean

问题补充：

It’s hard to keep the house with three kids.

A. cleaning

B. to clean

C. cleaned

D. clean

答案：

A. cleaning

B. to clean

C. cleaned

(答案→)D. clean

解析：句意：有三个孩子很难保持房子干净。考查keep+宾语+形容词宾补，clean

，形容词，干净的。所以选D。