【題目】— Do you know________second—hand smoke? — To protect our health.

A.how we should preventB.where should we preventC.why we should prevent

【答案】C

【解析】

句意:——你知道我們?yōu)槭裁匆柚苟譄焼幔?/span>——保護(hù)我們的健康。

考查賓語(yǔ)從句的用法,從句要用陳述語(yǔ)序。因此排除B。通過(guò)答語(yǔ)可知體現(xiàn)對(duì)原因進(jìn)行提問(wèn),因此C項(xiàng)正確。故選C

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