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。