I prefer taking exercise in my spare time ＿＿ healthy.A. to keepB. to keeping C. rather tha

问题补充：

I prefer taking exercise in my spare time ＿＿ healthy.

A. to keep

B. to keeping

C. rather than keeping

D. rather than keep

答案：

(答案→)A. to keep

B. to keeping

C. rather than keeping

D. rather than keep

解析：句意：我更喜欢在空余时间做运动来保持健康。to keep healthy做目的状语。本题受思维定势的影响容易选B，prefer doing sth to doing sth,但不合逻辑。