4. Make sure the door is _________(关牢) before you go to bed.

3. The minister is in charge of foreign __________(事务).

2. The swimming pool won’t be open because it is under ___________(修理).

1. Keep away from their _________(争吵)

28. kept track of　 　29.As with　 30.no accident

25.attempt 　26.get stuck　 27.after all;

21.trial and error　 22.paste; glue 　23.storage 　24.Keep track of

18.previous　 19.was aware of　 20.was aware of; was aware that

15.otherwise; would have 　ections 　ects

11.partial　 12.broke away from　 13.possibility　 14.otherwise