1. (2019·南京) 书面表达

What must you do to cross the road safely? What must you not do on the road?

要求:

1）根据提示及图意完成短文，信息不要缺漏。

2）语句通顺,条理清楚，30~50词。

Road safety

To cross a busy road safely, we must               .

We must not                                     .