组卷网 > 初中英语综合库 > 语法 > 主从复合句 > 宾语从句 > 宾语从句的引导词 > if/whether引导宾语从句
题型:单项选择 难度:0.4 引用次数:1653 题号:8332389
Before you ask someone for help, find out          he is the right person for your problem.
A.sinceB.thatC.whetherD.unless
2019·河南·中考真题 查看更多[12]

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