单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

[A] At a library. [C] At a laboratory.
[B] At a copy shop. [D] At a coffee shop.

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单项选择题

[A] When they’re unable to control the person’s behavior. [C] When the consequences of the behavior are unpleasant. [B] When the causes of the behavior are obvious. [D] when the behavior is expected.

[A] When they’re unable to control the person’s behavior. [C] When the consequences of the behavior are unpleasant.
[B] When the causes of the behavior are obvious. [D] when the behavior is expected.

单项选择题

[A] Lightning-and thunder. C. A great deal of water vapor and a rapidly rising air current.B. Warm air and cold air. D. A great amount of vapor and electricity.

[A] Lightning-and thunder.
C. A great deal of water vapor and a rapidly rising air current.
B. Warm air and cold air.
D. A great amount of vapor and electricity.

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