Question

【题目】－There lots of wolves in this forest, but now they are endangered.

－Yes. Something must be done to protect them.

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

Answer 1

【答案】D

【解析】

句意：——以前森林里有很多狼，但现在它们濒临灭绝。——是的，必须采取措施保护他们。这里是there be句型的过去式，其结构是there used to be+主语+介词短语；used to be表示过去常常……样，根据题意，故选D。