—Acomputerisverypopularandhelpful.  —Ithinkso.It

問題詳情：

— A computer is very popular and helpful .

   — I think so. It _______ in many different fields.

    A. used            B. will use           C. is used          D. was used

【回答】

C

知識點：動詞語態

題型：選擇題