单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．Why species don’t avoid extinction by adapting.
B．Why species become extinct at the rate they do.
C．Why humans aren’t extinct.
D．How many species aren’t extinct.
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单项选择题
A．The man can have his pants at the end of the day.B．Cleaning the pants will take longer than usual.C．She doesn’t think the stain can be removed.D．The man should go to a different location.
A．The man can have his pants at the end of the day.
B．Cleaning the pants will take longer than usual.
C．She doesn’t think the stain can be removed.
D．The man should go to a different location.
单项选择题
A．They look at a house sitter’s score report.B．They interview a house sitter’s friends.C．They check a house sitter’s references.D．They attend a house sitter’s party.
A．They look at a house sitter’s score report.
B．They interview a house sitter’s friends.
C．They check a house sitter’s references.
D．They attend a house sitter’s party.
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