题目内容
介词填空。
It's kind ________ you to help us clean the house.
用介词填空。
It's seven now. I must go ________ school.
用适当的介词填空。
It's hard to get tickets ________ weekends.
It's very kind ________ you to say so.
It's very hot ________ this time of the year ________ Australia.