Oh no! We have no gas. Robert__________to fill the tank.
A could have forgotten
B should have forgotten
C must have forgotten
D might have forgotten
C
【翻译】哦,不! 我们没有汽油了,罗伯特一定忘记加油了。 [考点] 情态动词 【精析】C must have done表示对过去事情的肯定推测,意为“一定做了某事”,符合题 意。could have done表示“过去本可以做某事”;should have done表示“过去本应该做 某事”;might have done表示
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