根据汉语或首字母提示完成单词。

1. He is so            （精疲力竭的）that he can do nothing now.

2. Could you             (描述) our classroom in English?

3. If you're free, I'd like to I ____ you to dinner with my family.

4. There is nothing in the fridge. It's e           .

5.I had learned a lot about planting from that knowledgeable f______．