---I don’t know _______. Can you help me? ---I think you should calm down and read texts.
--- Why don’t we go climbing tomorrow? --- ___________
The little girl kept _____ the house, because she wanted to keep it _____.
___________ the three questions, which one is the most difficult to answer?
The Yellow River is __________ river in China.
The students come to school early, but the teachers come __________.