7.听一篇短文,回答16-20题. 16.Which city have the girl's parents gone to? A.Nanjing. B.Beijing. C.Shanghai. 17.When will they come back? A.Next Friday. B.Next Saturday. C.This Sunday. 18.Why is she unhappy? A.She is alone at home. B.She can't cook meals. C.She has no friends around. 19.When did Tina come to her house? A.At about 5a.m. B.At about 5:30 p.m. C.At about 6:30 a.m. 20.What will the girl learn later? A.To try to be happy. B.To learn to wash clothes. C.To look after herself.