①价值决定价格，价格波动影响供求关系

②价格以价值为基础，供求关系和价格相互影响

③供求关系影响价格波动，价格波动又决定价值

④价值决定价格，价格受供求关系的影响

⑴Dad，where are my keys? ____         A．No，thanks．

⑵What's in your schoolbag?____         B．He's a doctor．

⑶Would you like a knife and fork?____   C．They are in the door．

⑷What's your father's job?____          D．Yes，they are．

⑸Who is she?____                      E．Two pencils and many books．

⑹Are they on the table?____            F．She's my aunt．