单项选择题
The electric fan has blown away the terrible smell in the hall,（）?
A.can't it B.isn't it C.hasn't it D.doesn't it
单项选择题 The dog was tearing the cloth（）its teeth.
单项选择题 The doctor suggested that the patient（）in hospital for another week.
单项选择题 The construction of the new bridge has been（）for two weeks because of the bad weather.
