Susan used to__to school,but she is used to ___ to school now.

题目

Susan used to__to school,but she is used to ___ to school now.
A.walk ; take a bus     B.walk ; riding a bikes.
C.walk ; ride a bike     D.walked; took a bus
Buses ___ passengers.
A.are used to carring      B.are used to carry
C.used carry                   D.get used to carry
I don't suppose you're ccareless ,______?
A.don't you 
B.aren't you 
C.do I 
D.Are you 
为什么?

答案

B   used to do 过去常常    be used to doing习惯于
B   be used to do 被用于做某事
D 前否后肯