--Whoisthatmanswimminginthelake.IsitTom?    --It

問題詳情：

--Who is that man swimming in the lake. Is it Tom?

     --It ________ be Tom. She is sleeping in the bedroom.

    A. may    B. must    C. can’t    D. should

【回答】

C

知識點：情態動詞

題型：選擇題