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人为富营养化在内陆水体最易产生，其中不良现象是在湖泊和水库出现的水华。()

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Young children ______ language intuitively, without having to be taught grammar, pronunciation and vocabulary.

A. pick up
B. put up
C. bring up
D. turn up

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Two substitutes were used in a fierce soccer game last night. The underlined part means______.

A. atheletes
B. judges
C. replacements
D. coaches

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She had to______in the hotel room for the Spring Festival holiday.

A. put up
B. put down
C. put on
D. put out

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Why does the woman say her purse is the horrible bottomless pit？

A. Because the online bank service is not safe for her money.
Because there is a hole in her purse and she has lost a big sum of money.
C. Because things in it are so disorganized that she doesn"t know what is in it.
D. Because she keeps on spending money and she is stuck in debt now.

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