单项选择题

A. By waving their branches.
B. By giving off a special vapor.
C. By changing the color of its leaves.
D. By changing the chemistry of its trunk.
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单项选择题
A. He was the only person who helped. B. He shouldn’t have helped. C. He was well-intentioned. D. He finds it hard to paint the fence.
A. He was the only person who helped.
B. He shouldn’t have helped.
C. He was well-intentioned.
D. He finds it hard to paint the fence.
单项选择题
A. To take care of their pets when they are on vacation.B. To organize a welcome party when they are back form vacation.C. To see them off at the airport.D. To do some shopping for them while they are away from home.
A. To take care of their pets when they are on vacation.
B. To organize a welcome party when they are back form vacation.
C. To see them off at the airport.
D. To do some shopping for them while they are away from home.
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