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单项选择 适中0.65 引用1 组卷90
Your father has just fallen asleep. Don’t wake him up ________ it’s really necessary.
A.unlessB.orC.andD.if
21-22八年级下·山东东营·期末
知识点:andunlessunless引导条件状语从句从属连词辨析 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!