问题补充:
单选题Thelittlegirl,butherfamilywastoopooratthattime.A.could go to schoolB.could have gone to schoolC.must have gone to schoolD.can have gone to school
答案:
B解析对过去事情表示猜测,应用情态动词的完成式。could have done表示“本有可能,但却没有”。
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