集合P={-1，1}，Q={0，1，2}，则P∩Q=______．
∵P={-1，1}，Q={0，1，2}，
∴P∩Q={1}．
故答案为：{1}．
读下列句子，选择正确答案填在横线上。
1. I don't like ___________ pants. I like ___________ sweater. (that, those)
2. These pants ___________ red. That shirt ___________ blue. (am, is, are)
3. I ___________ my new shirt. She ___________ her new shoes. (likes, like)
4. I need ___________ clothes. They ___________ new. (this, these; are, is)
