2. 外语
  3. He ______ at the steel plant since 1949.

He ______ at the steel plant since 1949.

admin2008-11-13  14
问题 He ______ at the steel plant since 1949.
选项 A、was working
B、worked
C、has been working
D、work
答案C
解析 现在完成进行时表示动作从过去的某个时刻开始，一直延续到现在，强调动作的延续。
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