— What do you often do in your free time?
— I spend all my free time English.
A. practise
B. practises
C. to practise
D. practising
网友回答
A. practise
B. practises
C. to practise
(答案→)D. practising
解析：句意：你空闲时间通常做什么？我的空闲时间都是在练习英语。spend +时间+（in）+doing sth花费时间做某事，固定句型故选D