Exercise 1. Complete the sentences with must/ mustn’t ⇱
(điền vào ô trống đúng từ must hoặc must not).
Question 1.
You speak loudly in hospital.
Question 2.
Look at the speed limit. You drive at more than 40 km/ hour.
Question 3.
You be late for class if you don’t want to be punished.
Question 4.
You walk on the grass in the park.
Question 5.
This is a secret. You tell anybody.
Question 6.
You make noise in the library.
Question 7.
It is raining. You take an umbrella or you will get wet.
Question 8.
Passengers fasten their seat belts while on the car.
Question 9.
Students at high school use the phone in class.
Question 10.
You follow the instruction if you don’t want to have anything wrong with that machine.