题目内容：

根据句意，在答题卷标有题号的横线上，写出括号内所给单词的适当形式。

1.Our __________ (three) lesson begins at 9:55 a.m.

2.I usually go to school on __________ (feet) because my home is close to the school.

3.— Do you like any special holidays?

— Yes. We have lots of fun on __________ (child) Day.

4.You should try your __________ (good) to learn English well, for it is very useful.

5.He likes playing basketball and he is one of the greatest __________ (play) in his school.