— How does Jack usually go to school? — He ride a bike but now he there to lose weight

问题补充：

— How does Jack usually go to school?

— He ride a bike, but now he there to lose weight.

A. used to; is used to walk

B. was used to; is used to walking

C. was used to; is used to walk

D. used to; is used to walking

答案：

A. used to; is used to walk

B. was used to; is used to walking

C. was used to; is used to walk

(答案→)D. used to; is used to walking

解析：句意：杰克通常如何去学校？他以前常常骑自行车，但是现在他为了减肥已经习惯了走着去那里。Used to do sth意为“过去常常做某事现在不做了”；be used to doing意为“习惯于做某事”；be used to do sth意为“被用来做某事”；故选D。