10.Yao Ming put his effort basketball training a very young age.A. to inB. to atC. int

问题补充：

10.Yao Ming put his effort basketball training a very young age.

A. to, in

B. to, at

C. into, in

D. into, at

答案：

A. to, in

B. to, at

C. into, in

(答案→)D. into, at

解析：句意：姚明在很小的时候就将精力放在篮球训练上。Put one’s effort into sth意为“将某人的精力放在某事上”；at a young age意为“在很年轻的时候”；故选D。