单项选择题

Questions 27-30

A. She’s waiting for her father.
B. She’s having her bicycle repaired.
C. She wanted to surprise John.
D. She works there.
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单项选择题
A. The advantages of traditional surveying methods. B. Using satellites to communicate with mountain climbers. C. Obtaining new information about a mountain. D. Controlling satellites from the top of a mountain.
A. The advantages of traditional surveying methods.
B. Using satellites to communicate with mountain climbers.
C. Obtaining new information about a mountain.
D. Controlling satellites from the top of a mountain.
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.
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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