问题
选择题
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
答案：D
题目分析：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。