26. As soon the bell _________, all the students _________ their seats and waited for the teacher.

25. Mr Smith, with his family, ___________ to visit Shanghai once a year.

24. I’ll let his mother know if Jack ___________ Beijing tomorrow.

23. A: ___________ your uncle ___________ in Pudong?

　 B: Yes, but now he is not here. He ___________ away for two months.

22. If Mr White ___________ to our office tomorrow, I’ll let him do it again.

21. While we ___________ the English lesson, someone was knocking at the door.

20. You must take the underground, or you ___________ to the meeting on time.

19. When Alice ___________ home yesterday afternoon, Mary ___________ for her. Mary asked Alice __________ her call and ___________ her whether she ___________ to the library with her next Sunday.

18. He can’t walk fast because he ___________ a heavy box now.

17. I can’t find my key. I think somebody ___________ it by mistake.