---ShallDavidgotoseethefilm?---Not________hehasfinishedhishomework.A.si

发布时间:2020-08-06 18:24:26

---Shall David go to see the film?---Not ________ he has finished his homework.A.sinceB.onceC.whenD.unless

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D解析此处问句的意思是“要不要让David去看电影?”表示提议,回答则是“除非他把作业做完,否则不行”。
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