根据句意选择正确的单词填空。

1．The plane landed on the airport_________（safe，safely）．

2．Don’t you think we need time and_________（free，freedom）to relax．

3．Don’t rush in the street，it’s really __________（danger，dangerous）

4．The little boy can dress__________（him，himself）．

5．She makes a _________ （decide，decision）to study hard from now．

6．She fell off her bike．_________（lucky，luckily），she didn’t hurt herself．