1.
complete the second sen
There are three computer rooms in our school.
Our school
2.
You are not allowed to step on the grass inside the building.
You mustn't
3. There's not much rain, so she doesn't need an umbrella.
She doesn't need
4. The school library is in front of the science lab.
The science lab
5.
He finds physics much more difficult than other science subjects.
He finds other science subjects
6.
It's a good idea to wear a hat when walking in the sun.
You'd better
7.
Remember to buy some souvenirs when you visit the place.
Don't
3. You should take bottled water, or you will have to buy some.
If you don't