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问题: 请教几道英语题目!!!!!! 很急的!!!!!!

1.The heron doesn't dance so often as she____.
A.used to
B.used
C.is used to
D.was used to
2.They walked ____ the end of the street.
A.until
B.till
C.to
D.for

解答:

1。A 2。C