I often spend a lot of time after class.A. practicing playB. to practice playingC. to pra

问题补充：

I often spend a lot of time after class.

A. practicing play

B. to practice playing

C. to practice to play

D. practicing playing

答案：

A. practicing play

B. to practice playing

C. to practice to play

(答案→)D. practicing playing

解析：句意：我经常在课下花费大量时间练习演奏。首先考查短语spend time doing sth，意为“花费时间做某事”；而动词practice后面跟动词做宾语时需要用doing，即花费时间练习做某事的表达为：spend time （in）practice doing sth，故选D。