单项选择 适中0.65 引用1 组卷236
The reason ________ the injection needs repeating every year is ________ the virus changes.
| A．why; because | B．why; that |
| C．that; why | D．that; because |
22-23高一上·广东深圳·期中
知识点：that, whether, as, as if, as though, because引导的表语从句关系副词why引导限制性定语从句 答案解析 【答案】很抱歉，登录后才可免费查看答案和解析！ 立即登录
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| A．That , that | B．What , when |
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