问题
选择题
He ___ go to work by bus, but now he ___ riding a bicycle to work.
A．used to; used to
B．used to; is used to
C．is used to; used to
D．is used to; is used to
答案
答案：B
这里是考used to和is used to的用法。这里表示一种对比关系，以前是那样，现在不是那样了。