根据汉语写出英文单词

1. There is very ______(严重) pollution in the big city .

2. Everyone can ______(成功) if you work hard.

3. Eating too much can make you ______(胖).

4. Lei Feng is a good ______(榜样) for us to learn.

5. We all hope to pass the ______(期末) examination.