—What were you doing at this time yesterday?
—I ______ on the grass and playing with Tony.
| A．sit | B．sat | C．am sitting | D．was sitting |
—Which is _______, the sun, the moon or the earth?
—Of course the sun.
A. smaller B. the smallest C. the biggest
The teacher tells the students ________in class.
A. don’t make faces B. not to make faces C.not make faces
—Must I let my mother know it?
—________.You can keep it as a secret.
A. Yes, you must B. No, you mustn’t C. No, you needn’t
—I called you at about 8:30 last night, but nobody answered.
—Oh, I ________in my office at that time.
A. worked B. was working C. will work
Mr Lee was so tired that he couldn’t keep his eyes________.
A. open B. closed C. close