2. 外语
  3. We have the regulation______whoever leaves the room last ought to turn off the lights.

We have the regulation______whoever leaves the room last ought to turn off the lights.

admin2010-02-22  41
问题 We have the regulation______whoever leaves the room last ought to turn off the lights.
选项 A、whom
B、that
C、how
D、what
答案B
解析
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