【題目】——I ______ know you can play the piano so well. ——Thank you.

A.didn't
B.don't
C.can't

【答案】A
【解析】句意:——我不知道你鋼琴彈得那么好。——謝謝。A. didn't不,一般過去時(shí)態(tài),指過去的狀態(tài)及過去發(fā)生的動(dòng)作;B. don't不,一般現(xiàn)在時(shí)態(tài),指經(jīng)常性、習(xí)慣性的動(dòng)作;C. can't不能,指能力;不可能,表示否定的推測(cè)。根據(jù)語境,說話時(shí)我已知道你鋼琴彈得好,不知道是過去的狀態(tài),用一般過去時(shí),故選A。

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