用适当的词填空。 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.