【題目】These years the level of the sea has risen a little because of the greenhouse effect.(對劃線部分提問)
the level of the sea risen a little these years?

【答案】Why;has
【解析】句意:這些年因為溫室效應(yīng)的影響,海平面上升了一點兒。句中劃線部分是because引導(dǎo)的原因狀語從句,因此應(yīng)用疑問詞why來提問原因;原句使用的是現(xiàn)在完成時態(tài),has是助動詞,變疑問句的時候,直接提到主語前面。所以答案是Why has。

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