单项选择题
A. Confirmation of the New EffectB. Pain-relieving and Fever-reducing Effects of AspirinC. The Ignored Significant ObservationsD. The Origin of AspirinE AnE. xplanation of Craven's ObservationsF. Further Findings of Dr. Vane
A. Do;doesB. Does;doC. Do;doD. Does;does
A. speakB. tellC. buyD. ask
A. Are you from BeijingB. Do you come from BeijingC. Where are you fromD. When are you from
A.go toB.to goC.to go toD.going to