how does jack usually go to school -he _ride a bike,but now he _there to lose weight .
问题描述:
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 useding to waiking
c; was used to ;is used to walk
d;used to ;is used to walking
答
d
used to+do
be used to +doing