单项选择题


Questions 19 to 21 are based on the conversation you have just heard.

A．It gives us sufficient information.
B．It gives misleading information.
C．It lets us know the best product.
D．It fails to convince people.
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单项选择题
According to Dr. Doris Mccubbrey, dieting is ______for weight control.
A．inessential
B．necessary
C．harmless
D．helpful
单项选择题
A．A guest talked for too long.B．The program was too short.C．The audience was too noisy.D．The host was inexperienced.
A．A guest talked for too long.
B．The program was too short.
C．The audience was too noisy.
D．The host was inexperienced.
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