Question

【題目】There ________ a lot of trees here, but now it has become desert.

A. is B. have C. used to be D. used to being

Answer 1

【答案】C

【解析】句意：這里曾經(jīng)有很多樹，但是現(xiàn)在它變成了沙漠。used to do sth過去常常做某事，現(xiàn)在不做了；根據(jù)but now此處表示與現(xiàn)在對(duì)比，表示過去，現(xiàn)在是沙漠，過去有很多樹。根據(jù)句型there be表示存在，故用used to be，故選C。