【題目】If you swim in a river or lake, be sure to investigate is below the water surface. Often there are rocks or branched hidden in the water.

A. what B. who C. that D. whoever

【答案】A

【解析】

試題分析：句意：如果你在河里或湖里游泳，請(qǐng)確定查看水面下有什么？通�？傆幸恍┦^或樹(shù)枝藏在水里。此處的what指代的是樹(shù)枝或石頭，B選項(xiàng)和D選項(xiàng)用于指人，that 只有語(yǔ)法意義。句式上，該句用了(If 從句，祈使句)的句式，非謂語(yǔ)to investigate 后接一個(gè)賓語(yǔ)從句的表達(dá)。分析賓語(yǔ)從句的成分可以發(fā)現(xiàn)，空格所做的成分是主語(yǔ)。根據(jù)下一句的表述中的樹(shù)枝和石頭，可以得出答案是what.

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