1. 根据句意及中文提示填写单词。

1. （1） It's kind of you to offer us such （有价值的）advice.

3. （2） There's no （怀疑）that they will win.

5. （3） If you don't know the word, you can look it up in the （字典）.

7. （4） I called her yesterday, but there was no （答复）.