单词拼写。

1. Many students attended the lecture, i______ our monitor.

2. Though he is not a n______ English speaker, he can speak English very fluently.

3. Though I haven't met him for many years, I could r______ him immediately I saw him in the crowd.

4. He thought I had known the fact. But a______, I knew nothing about it.

5. Luckily, after the earthquake, the people have got a lot of i ______ help.