________ several years he has been working like this.A．InB．AfterC．ForD．Since
题型：不详难度：来源：
| ________ several years he has been working like this. |
答案
| C |
解析
| 本题的含义是他一直像这样工作了数年，for连接时间长度数年，故本题选C。 |
举一反三
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