单项选择题

A. Though sunshine is free, we still need to purchase fuel to operate a solar heating system.
B. We need to purchase a solar system before we can use the sunshine.
C. If we want to use sunshine for the solar heating system, we must buy fuel first.
D. It’s not necessary to buy fuel to run a solar heating system.
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单项选择题
A. Our company will arrange an exhibit for the Science and Technology Week. B. Our company has been upset by the city authorities’ final decision. C. We are displeased with the arrangement of the Science and Technology Week D. We have dissuaded the city authorities from setting up the week’s display.
A. Our company will arrange an exhibit for the Science and Technology Week.
B. Our company has been upset by the city authorities’ final decision.
C. We are displeased with the arrangement of the Science and Technology Week
D. We have dissuaded the city authorities from setting up the week’s display.
单项选择题
A. She doesn’t know how to swim. B. The water was too deep. C. The water was too cold. D. She didn’t have enough time.
A. She doesn’t know how to swim. B. The water was too deep.
C. The water was too cold. D. She didn’t have enough time.
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