单项选择题

Passage One

A. Sufficient sleep.
B. A brisk walk.
C. A cup of coffee.
D. Good mood.
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单项选择题
A. It is an electrical water pump. B. It is a water pump that requires no external water supply. C. It is a water pump that requires almost no external energy. D. It is a water pump that requires only internal energy source.
A. It is an electrical water pump.
B. It is a water pump that requires no external water supply.
C. It is a water pump that requires almost no external energy.
D. It is a water pump that requires only internal energy source.
单项选择题
A. Sending an e-mail. B. Working in an office. C. Talking on the phone. D. Doing spelling practice.
A. Sending an e-mail.
B. Working in an office.
C. Talking on the phone.
D. Doing spelling practice.
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