单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A) Steel cables. C) An open carriage.
B) Guide rails. D) Strong ropes.
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单项选择题
A) At five o’clock. C) At four thirty. B) At five thirty. D) At four o’ clock.
A) At five o’clock. C) At four thirty.
B) At five thirty. D) At four o’ clock.
填空题
The chief causes of water shortage are population growth and water pollution.
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