题目内容：

根据句意、首字母或中英文提示，写出句中所缺单词。

1.There are al kinds of trees on the_______(地球).

2.The boy was late for class. He went into the classroom _______(很快地).

3.He never ________ (回复)to me. So I stopped writing to him.

4.We should _______(决定) what to do next.

5.Don’t stay at home a_________. Come down and play with us.