—There a factory here, but now it has changed into a big supermarket.— You are so lucky t

—There a factory here, but now it has changed into a big supermarket.
— You are so lucky to live here.
A. used to have
B. is used to be
C. used to be
D. was used to be

A. used to have B. is used to be(答案→)C. used to be D. was used to be解析：be used to sth习惯于某事;used to do sth过去常常做某事. sth be used to do sth某物被用来做某事。句意：过去这儿有一家工厂，但是现在它已经变成了一家大超市。——住在这儿你太幸运了。结合语境可知选C。

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