they began to clumb the mountian after they had bought all the food and drinks改为否定句

they began to clumb the mountian after they had bought all the food and drinks改为否定句
英语人气:416 ℃时间:2020-01-29 21:28:20
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用not...untilthey didn't begin to clumb the mountian until they had bought all the food and drinks好像错了耶,应该是they didn't begin to clumb the mountian before they had bought all the food and drinks好像错了耶,应该是they didn't begin to clumb the mountian before they had bought all the food and drinks
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