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The new staff didn’t know how to use the system______I explained it to him yeste
The new staff didn’t know how to use the system______I explained it to him yeste
游客
2023-09-26
51
管理
问题
The new staff didn’t know how to use the system______I explained it to him yesterday.
选项
A、until
B、because
C、if
D、since
答案
A
解析
直到我昨天给这位新员工解释,他才知道如何使用这套系统。本题考查连词用法。until表示"在…以前";because表示"因为";if表示"如果"或"是否";since可表示"自从"或"因为"。原句中前半句和后半句不存在因果和假设关系,运用not…until…结构,表示"直到…才"。参考例句:(1)I knew nothing until you told me.(一直到你告诉我,我才知道)。(2)She won’t leave here until you promise to help her.(直到你答应帮忙,她才会离开这儿)。
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