I phoned you at six yesterday evening, ______ nobody answered.

    A. because      B. or           C. but          D. so

用括号内所给动词的正确形式填空(共5小题；每小题1分。满分5分)

1.一I phoned you yesterday morning, but you were not in.

一We __________ (fish)by the river.

2.___________ (make)sure that there are no mistakes，he will check the paper carefully.

3.Is the washing machine I have used for a long time worth __________(fix)?

4.There ___________(not be) much snow here in the past three years.

5.I don’t know if we ___________(sbow) around the History Museum tomorrow afternoon.

I phoned you at six yesterday evening, ______ nobody answered

1. A.
   because
2. B.
   or
3. C.
   but
4. D.
   so

—I phoned you at 7:00 this morning. But there was no answer.
—Well, maybe I _________ morning exercises at that time.