Which of following is not about the central idea of Text A of Unit 5（）
A. Water is important resource
B. C. Agriculture needs water for irrigation
C. D. Conserve water first. Then, follow it up with new solutions
D. B. Getting water right is the great challenge
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以下属于爆破音+爆破音失去爆破的情况有（）
A. C.what time
B.good friend
C. D. good night
D. A. good bye
Which of following description related to “Kennedy’s moon-shot speech” is NOT true（）
A. Kennedy is US President John F. Kennedy
B. C. Kennedy challenged Congress and the American people to put a man on the moon
C. D. Kennedy was sent to the moon
D. B. The speech was held on May 25, 1961
The bus was held up by the traffic jam,____（）
A. thus causing the delay
B. D. caused the delay
C. so that caused the delay
D. B. to cause the delay
Which hydroelectric dam is the world’s largest power station（）
A. B. Itaipu hydroelectric power plant
B. A. The Chinese Three Gorges Dam
C. D. Vajont Dam
D. C. Grande Dixence Dam
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