Iplay the piano when I was a young boy.A. wasn’t used toB. wasn’t use toC. didn’t used toD

问题补充：

Iplay the piano when I was a young boy.

A. wasn’t used to

B. wasn’t use to

C. didn’t used to

D. didn’t use to

答案：

A. wasn’t used to

B. wasn’t use to

C. didn’t used to

(答案→)D. didn’t use to

解析：

句意：我孩提时不常弹钢琴。used to表示“过去常常做某事”，其否定式是didn’t use to。故选D，