单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A．Sleep can strengthen memories.
B．Sleep can recover memories.
C．Sleep can protect memories against interference.
D．Sleep can harm memories.
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单项选择题
A．Because they want to sell canteens.B．Because they want to educate the tourists about park conditions.C．Because the tourists may get sick or die from dehydration.D．Became the tourists may get lost.
A．Because they want to sell canteens.
B．Because they want to educate the tourists about park conditions.
C．Because the tourists may get sick or die from dehydration.
D．Became the tourists may get lost.
单项选择题
A．She needs some information.B．She wants packing materials.C．She is checking her package.D．She is moving to California.
A．She needs some information.
B．She wants packing materials.
C．She is checking her package.
D．She is moving to California.
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