1
We mustn’t ……………………mobile phone when we drive a car
2
You ………….obey your parents
3
People ………………smoke on the plane
4
Yesterday, he ………………take a taxi to work
5
I'm really hungry. I ………………eat a sandwich
6
Sara ………………….wear a coat, the weather is fine
7
We ………………….. buy sugar , we have much
8
People ................... follow the rules in public places
9
For example, drivers .................. stop their cars if the traffic signal is red
10
At the same time, they ................ talk on their mobile phones while driving
11
At school, students .............. wear a uniform
12
They .............. follow the school rules and obey the orders
13
On Friday, they ................... have to go to school because it is a holiday
