Please be quiet. My father .A. sleepB. sleeps C. is sleepingD. are sleeping

问题补充：

Please be quiet. My father .

A. sleep

B. sleeps

C. is sleeping

D. are sleeping

答案：

A. sleep

B. sleeps

(答案→)C. is sleeping

D. are sleeping

解析：句意:请保持安静. 我的父亲正在睡觉. 结合语境可知本句描述的是现在正在进行的动作,故用现在进行时态. 选C.