题目内容：

根据句意，用括号中所给的单词正确形式填空。

1.Some of the guides (导游 ) just don’t know how _________(show) visitors around

2.It’s not polite to go into the room without knocking on _________(people) door.

3.Everyone is busy with the mid-term exams, so we have no time________(play) volleyball.

4.We do eye exercises carefully       (two) a day at school.

5.Each of us always _______ (stay) at home and studies hard at weekends.