Ⅰ.用所给单词的适当形式填空
1．All the people in the world wish to enjoy a beautiful and ________(peace) life.
2．The panda is our________ (nation) animal.
3．I________ (keep) the books for three weeks.
4．Peter comes from the U．S. He is an ________(America)．
5．Our teachers always treat us very________ (fair)．
