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

How long have you known John? — Since he ______ to our class

How did the writer win the prize—He worked day and night for two years. ______ . he succeeded.

Kate English and art on Friday afternoon .

The days are gone _____ physical strength was all you needed to make a living.