问题
How does Jack usually go to school — He _____ ride a bike, but now he ______there to lose weight.
A: used to; is used towalk
B: was used to; isused to walking
C:was used to; is used towalk
D: used to; is used to walking
B: was used to; isused to walking
C:was used to; is used towalk
D: used to; is used to walking
正确答案是：
