12 Fill in the gaps with: needn't, mustn't, must
1 You tell Sarah what her birthday present is - it's
a surprise.
2 You have a passport if you want to travel abroad.
3 You bring a raincoat - the weather forecast said
it was going to be sunny.
4 Students
.
hand in their exam papers at the end
of the exam.
5 You
collect me from work I'll take the bus
home.
(5 marks)

1. mustn't - The sentence states that it is a surprise, so it is not allowed to tell Sarah what her birthday present is.
2. must - In order to travel abroad, you must have a passport.
3. needn't - The weather forecast said it was going to be sunny, so there is no need to bring a raincoat.
4. must - Students must hand in their exam papers at the end of the exam. It is a requirement.
5. must - If you collect me from work, I will take the bus home. It implies that it is necessary for you to collect me.