问题
单项选择题
据估算，到2020年，要弥补中国的粮食缺口，单产必须提高（）。
A.2%
B.8%
C.20%
D.28%
答案
参考答案：C
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据估算，到2020年，要弥补中国的粮食缺口，单产必须提高（）。
A.2%
B.8%
C.20%
D.28%
参考答案：C
| 完形填空。 | ||||
| Mr. John was at the window of a train in 1 . He was going to Washington, and now he was 2 . The train began moving, and an old worker 3 the window. Mr. John shouted angrily at the 6 , " I gave you my luggage (行李) an hour ago, 5 you didn't put it in the train. Why isn't it here, and where did you 6 it?" The old man smiled at Mr. John and said, "I looked 7 you here and there, but I didn't 8 you. Your luggage isn't as foolish 9 you are. You are in the wrong 10 . This one is going to New York." | ||||
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