The new staff didn’t know how to use the system ( ) I explained it to him yesterday. ( 章节：2 难度：1)
- A、until
- B、because
- C、if
- D、since
正确答案:C
答案解析:有
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The new staff didn’t know how to use the system ( ) I explained it to him yesterday. ( 章节：2 难度：1)
微信扫一扫手机做题