题目内容

用I doubt whether/if/I don't doubt that There is no doubt that/about/without doubt 完成句子。
1. 毫无疑问,我们的实验会成功的.
  There is no doubt  _____  our experiment will succeed.
2. 她是否会准时来有点让人怀疑.
  There is some doubt  _____  she will come on time.
1. that      2.  whether
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