The manager devotes all his spare time the violin.A. to practiseB. to practicingC. in pra

问题补充：

The manager devotes all his spare time the violin.

A. to practise

B. to practicing

C. in practising

D. for practising

答案：

A. to practise

B. to practicing

C. in practising

D. for practising

解析：考查词组：devote all one’s time to doing全部时间都花在…上，句意：经理所有时间都花在练习钢琴上面。选B。