【題目】You have to stay at home if your homework________ before five o'clock.

A. isn't finished B. will finish

C. finished D. wasn't finished

【答案】A

【解析】句意:如果你的家庭作業(yè)沒(méi)有在五點(diǎn)之前完成,你必須呆在家里。本句是if引導(dǎo)的條件狀語(yǔ)從句,主句用一般現(xiàn)在時(shí),從句也應(yīng)用一般現(xiàn)在時(shí)態(tài);主語(yǔ)homework與“finish”是被動(dòng)關(guān)系,所以使用一般現(xiàn)在時(shí)態(tài)的被動(dòng)句。is/am/are+動(dòng)詞的過(guò)去分詞。finishedfinish的過(guò)去式或過(guò)去分詞。故選:A。

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