I find Peter always______ his classmates in a debate, even though the argument is not sufficient.

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问题 I find Peter always______ his classmates in a debate, even though the argument is not sufficient.

选项 A、backs up
B、backs down
C、backs out
D、backs off

答案A

解析 题意是:我发现在辩论中彼得总是______ 他的同学,即使论证并不充分。[A] backs up.“支持”,符合题意。  [B] backs down“放弃,后退”;  [C] backs out“退出”,后接名词时必须与of连用;  [D] backs off“放弃,后退”。因此,这三项都不符合题意。
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