It took them three years to pay off their debts．

John studied hard before the examination, and it paid off．

She opened the door quietly so as not to disturb the sleeping child．

He put his oars in the water and disturbed the smooth surface of the lake．

The plot of the novel relies too much on coincidence．

By a strange coincidence we happened to be travelling on the same train．

英汉互译

(1)He had to present a smiling face though heavy-hearted．

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(2)在座的有20个孩子。

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英汉互译

(1)很抱歉，我现在帮不了你——实在太忙了。

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(2)He often gave his neighbor’s kids little presents．

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英汉互译

(1)这房间很快就腾空了。

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(2)The stream empties itself into the river．

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英汉互译

(1)这座房子是空的，没有人住。

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(2)His words are empty of sincerity．

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