1 . 一听到这个让人迷惑的问题，他感到迷惑不解，脸上出现了迷惑的表情。
_________________ the _____________ problem, he felt ___________ and there was a _________ look on his face.

3 . It is__________(amaze) how quickly a child learns a language.（所给词的适当形式填空）

4 . I get ________(恼火，不悦) when someone talks to me while I am reading.（根据汉语提示单词拼写）

5 . You may find it ________ （astonish） that he made progress in such a short time. （所给词的适当形式填空）

6 . The news was______________(excite) and they were all ______________ (excite) at it. (所给词的适当形式填空)

7 . He ________(astonish) to see how his hometown had changed in the past 10 years. （所给词的适当形式填空）

8 . The news that they announced was so _______ (surprise) that many couldn’t believe it. （所给词的适当形式填空）

9 . You don’t know how ________(scare)we were about getting cancer last time. （所给词的适当形式填空）

10 . I quickly lower myself, ducking my head to avoid looking directly into his eyes so he doesn't feel____(challenge). (所给词的适当形式填空)