根据下列句子及所给汉语注释，在句子空缺处写出各单词的正确形式（每空只写一词）。

1．There are about two _______________ （百）students playing on the playground.

2．The mother is _______________（自豪的）of her son, because he is very successful in his work.

3．There are many kinds of English _______________ （字典）in this bookstore. You can choose the one you like.

4．Look at the photo _______________（仔细地），and you will find our teacher.

5．Would you mind _______________（打开）the window? We need some fresh air.