填空题


【参考答案】

at：for(改at为for)。look at意为“看”look for意为“寻找”。根据上下文，此处应为look fo......

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填空题
was：were(改was为were)。group是集合名词。在集合名词作主语时，谓语动词有两种情况：当集合名词表示整体概念时，谓语动词为单数；当集合名词表示整体中的个体时，谓语动词为复数。
单项选择题
A．He has climbed mountains using a stick.B．He has climbed mountains riding a home.C．He has climbed mountains supported by a guider.D．He has climbed mountains using a system be devised himsel
A．He has climbed mountains using a stick.
B．He has climbed mountains riding a home.
C．He has climbed mountains supported by a guider.
D．He has climbed mountains using a system be devised himsel
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