Jack will not go out to play__________ he finishes his homework
问题描述:
Jack will not go out to play__________ he finishes his homework
填unless 或 until
答
unless.杰克将不能出去玩,除非他完成了他的作业.如果用until,就是杰克直到玩成了他的作业才将出去玩,不通,不能用will not,应该用did not