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

微信扫一扫手机做题
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