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1. First, we ate at the cafeteria. Then, we went to class. After we
_____ at the cafeteria, we ______ to class.
2. First, Juan made himself a sandwich. Then, he poured some tea.
After Juan _______ himself a sandwich, he __________ some tea.
3. First, Gunawan plugged in the headphones. Then, he played a
CD. Before he ______ a CD, Gunawan _______ in the
headphones.
4. First, Soriah fed the cat. Then, she called her mother.
Soriah ______ her mother after she ____ the cat.
5. First, Marie did her homework. Then, she watched TV.
Marie_____ her homework before she _____TV.

VIII. Underline the correct word or phrase in each sentence.
a) There's someone at the door. It can/must be the postman.
b) Don't worry, you don't have to/mustn't pay now.
c) I think you had better/would better take a pullover with
you.
d) Jones could/must be president if Smith has to resign.
e) Sorry, I can't stay any longer. I have to/might go.
f) It was 5 o'clock an hour ago. Your watch can't/mustn't be
right.
g) It's a school rule, all the pupils have to/must wear a
uniform.
h) I suppose that our team must/should win, but I'm not sure.
i) Let's tell Diana. She could/might not know.
j) In my opinion, the government might/should do something
about this.

IX. Complete each sentence so that it contains might, might not,
must, mustn't, can or can't. More than one answer may be
possible.
a) Don't stand up in the boat! You might fall in the river!
b) Sue says she's stuck in traffic and she … be late.
c) You really … start spending more time on your work.
d) Tell Peter he … stay the night here if he wants to.
e) That's a really stupid idea! You … be serious, surely!
f) You … realise it, but this is very important to me.
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