-Irememberthere

問題詳情：

-I remember there _____ a lot of fish in Yanglan Lake．Now it has been polluted．

-What a pity!I think we should play a role in protecting the environment．

A．are used to have   B．are used to be

C．used to have      D．used to be

【回答】

D

知識點：動詞和動詞短語

題型：選擇題