Busy as they are parents should at least two hours to spend with their children。A. set o

问题补充：

Busy as they are, parents should at least two hours to spend with their children。

A. set out

B. set away

C. set aside

D. set off

答案：

A. set out

B. set away

C. set aside

D. set off

解析：可联系答.案.网客服索取。