2. 外语
  3. A(If) the experiment succeeds or fails, it will B(provide us) with valuable C(experience) which is essential to D(improving) our

A(If) the experiment succeeds or fails, it will B(provide us) with valuable C(experience) which is essential to D(improving) our

admin2012-08-03  41
问题 A(If) the experiment succeeds or fails, it will B(provide us) with valuable C(experience) which is essential to D(improving) our future work.
选项
答案A
解析 改为Whether。因为在从句中后面有个or，所以用Whether.
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