-- Can you play the piano?-- ____________________________.

You ________ pay too much attention to your reading skill, as it is so important.

—Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.

As students, we ________ study hard to make our country more beautiful and stronger.

 Children of divorced parents ______ have difficulty in forming stable relationships themselves.