2. 外语
  3. Since last century, his family ______teachers.

Since last century, his family ______teachers.

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问题 Since last century, his family ______teachers.
选项 A、are
B、are being
C、have been
D、were being
答案C
解析 本句话翻译为“自从上个世纪开始，他的家里人就一直从事教师行业”，动作从过去发生，一直持续到现在，所以本句是现在完成时，只有C选项是现在完成时的用法，故选C。
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