题目内容
用所给词的适当形式填空。
1.It's polite to knock on the door before____________(enter) a room.
2.Some people have to wear glasses in class because they can’t see the blackboard_____(clear).
3.Our teacher gave us some advice that is worth____________(consider).
4.What a____________(fun) thing it is!
5.It's not polite to keep others____________(wait).
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