All the task __________ ahead of time, so they decided to go on holiday for a week.
A．having finishedB．had finishedC．having been finishedD．had been finished
D
這題考查句式，so引導(dǎo)的是結(jié)果狀語從句，所以前面是主句，應(yīng)該填謂語動(dòng)詞，時(shí)間是發(fā)生在they decided to go on holiday for a week.之前，而且task和finish是被動(dòng)關(guān)系，用過去完成時(shí)的被動(dòng)式，選D。
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