题目内容
13.I got an umbrella in the street. But nobody came to__________it.
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14.It is very important for China to develop science and__________in order to overtake the Western countries.
15.Although the two girls are twins, they are different in__________.
16.“Do you know how much air is in that bottle?” “Oh, I haven’t the__________idea”.
17.His mother is ill, so there is no__________of his coming.
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