选择所给单词的正确形式填空.

选择所给单词的正确形式填空.
one; put; child; cross; speed
1.Could you please ________ them away,please?
2.My study is on the _______ floor.
3.You must be careful when you go ________the street.
4.There are forty eight________in my class.
5.Here is a ticket for _______.