TheGreensusedtoliveinLondon,butthey

問題詳情：

The Greens used to live in London, but they ___________ in Beijing so far.

A. are used to living                     B. are used to live 

C. have been used to living           D. have been used to live

【回答】

C

知識點：動詞時態

題型：選擇題