单词拼写。

根据下列句子及所给单词的首字母或中文,写出各单词的正确形式(每空限填一词)。

1. Teachers are not supposed to have favorite students, and they should t______ everyone equally.

2. He's a person to be d______ on. You can rely on him to come to your help in time of need.

3. My first i_______ of him is that he is thin and tall and very handsome.

4. C________ your attention on your work, and you'll solve the problem.

5. According to the Ministry of Water Resources, about 320 million rural people in China are

    suffering from a l_______ of clean drinking water.

6. The houses are designed to _______ (吸引) to all ages and social groups.

7. My first _______ (尝试)to make a chocolate cake failed, but I decided to try again.

8. She was certainly _______ (有罪的), but the police couldn't prove it.

9. If a person takes drugs, they will slow down his thinking and _______ (最终) turn off his brain.  

10. Our plans need to be _______ (有灵活性的) enough to satisfy the needs of everyone.