根据句子意思及所给的词首字母或汉语提示，完成下列单词。

1. —My English is poor.

    —Don't w             . I can help you.

2. —What's the time?

    —It's a q             past three.

3. We have about eight              (百) students in our grade.

4. Don't              (忘记) to bring your English book here tomorrow.  

5. Jim is                (聪明的). The teacher likes him.  

吸烟有害健康，如图所示，公共场所通常有“禁止吸烟”的标志在空气不 流通的房间内有人吸烟，一会儿整个房间就会充满烟味，这是分子___________的结果。