—Isthisyourpen?—No,itisn’t.It

問題詳情：

— Is this your pen?

— No, it isn’t. It ________ be Cindy’s, but I’m not sure.

A. may                  B. must                 C. need                        D. would

【回答】

A

知識點：情態動詞

題型：選擇題