用括号内所给单词的适当形式填空。
1. Our English teacher is ________(friend)to us. We regard her as our friend.
2. Tom is such an honest and ________(help)boy that all the neighbors like him.
3. No matter what you ask, she always keeps ________(silence)and says nothing.
4. We can see some fishes ________(swim)in the river now.
5. My sister always wears ________(glass)when she goes out.