Modal Verbs of Obligation Exercise

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It's not obligatory to take a tie. You _______ wear one.
1. don't have to
2. shouldn't
3. have to
4. mustn't
Slow down or we're going to have an accident. You ______ drive so fast.
1. shouldn't
2. ought to
3. oughtn't to
4. should
Billy: Are you going to the party?
Sally: I'm not sure. I _______ go.
1. have to
2. don't have to
3. mustn't
4. might
Where's the toilet? I _______ go.
1. might
2. have to
3. mustn't
4. should
_______ I use your phone?
1. Must
2. Should
3. Have to
4. May
You _________ do your homework on Saturday morning. That way you have the rest of the week-end free.
1. must
2. might
3. shouldn't
4. ought to
You ______ be horrible to your sister. It makes her very sad.
1. must
2. shouldn't
3. mustn't
4. have to
Tomorrow's a holiday. We ________ get up early.
1. should
2. don't have to
3. have to
4. mustn't
You should take an umbrella. It ________ rain.
1. has to
2. shouldn't
3. might
4. must
If you go sailing, you _______ wear a life jacket. The sea is very dangerous.
1. might
2. should
3. must
4. mustn't