【題目】The window of the classroom _________for about three hours .Please go and close it.

A. has opened B. has been open

C. has been opened D. opened

【答案】B

【解析】

試題分析：句意為：教室的窗戶已經(jīng)開(kāi)了大約三個(gè)小時(shí)了。請(qǐng)去把它關(guān)上。在英語(yǔ)中，“open（開(kāi)）”為短暫性動(dòng)詞，不可用于表示一段時(shí)間的現(xiàn)在完成時(shí)句子中。但是其“開(kāi)”的狀態(tài)是可以延續(xù)的，可以用于表示一段時(shí)間的現(xiàn)在完成時(shí)句中。結(jié)合選項(xiàng)可知應(yīng)選B。

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