20. Amazingly, some swimmers can hold their breath for ________ twenty minutes.(A) up for (B) up aga

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20. Amazingly, some swimmers can hold their breath for ________ twenty minutes.
(A) up for
(B) up against
(C) up front
(D) up to

參考答案

答案：D
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Amazingly, some swim☆☆☆☆ ☆☆☆ ...

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