单项选择题

Why do we need active sleep

A. To prepare for passive sleep.
B. To rest our body.
C. To stay healthy.
D. To help us rest our minds.
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单项选择题
According to the author, the breakthrough of this technology starts firm ______.
A. computer science
B. telecommunication technology
C. phoning services
D. booking technology
单项选择题
It can be inferred from the passage that Marie finally resolved to continue with her busi- ness because______.
A. cancer patients kept writing to her, making orders for the products
B. the prospect of inheriting the legacy left to her by Barbara cheered her up
C. she knew she was doing something useful for others
D. she was determined to make profits from the business
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