单项选择题

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

A．He’s studying for a test.
B．He lost his notes.
C．He missed the class.
D．He’s doing research on alternative.
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单项选择题
A．Because the services cost them more time.B．Because the services are not as friendly as a bank clerk.C．Because they are not sure how to use the services.D．Because the clerks don’t offer help for them.
A．Because the services cost them more time.
B．Because the services are not as friendly as a bank clerk.
C．Because they are not sure how to use the services.
D．Because the clerks don’t offer help for them.
单项选择题
A．It preserves the vitamins.B．It breaks down the vitamins.C．It makes the meat easier to digest.D．It reduces the protein content.
A．It preserves the vitamins.
B．It breaks down the vitamins.
C．It makes the meat easier to digest.
D．It reduces the protein content.
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