单项选择题
You have a good voice.（）
A.Thank you B.Not at all C.Just so so D.My voice isn't good
单项选择题 You had better（）a doctor as soon as possible.
单项选择题 You can take as many as you like because these handouts are free of（）
单项选择题 You are late! The discussion started minutes ago.（）
