Modal verb must -
The Modal Verb must
Modal verb must is used in situations where:
1) expresses confidence in something:
Carol knows a lot about the history of cities and towns. She must travel a lot. Carol knows a lot about the history of cities and towns. She must travel a lot.
In this meaning, must can be combined with an infinitive in the form continuous:
Don’t bother him, he must be sleeping. Don't bother him, he must be sleeping.
2) emphasizes the need or importance in performing any action:
The book is very interesting. Everybody must read it. The book is very interesting. Everyone should read it.
Correct answers out of10. Result:
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1. I resist everything except temptation.
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must
can
have to
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2. All countries join their efforts to protect environment. By this they could prevent endangered species from disappearing.
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may
ought
must
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3. She play the violin when she was seven.
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was able to
could
cannot
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4. The suspect admit his fault as the evidence was irrefutable.
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had to
could
must
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5. I’ll visit them by all means, but I … leave early to collect the children from school.
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must
will have to
have to
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6. He come if he doesn’t want to.
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has to
doesn’t have to
mustn’t
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7. I’d love to to sing like you.
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be able
can
have
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8. Why didn’t you tell her about my invitation? — I wanted to, but I find her phone number.
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wasn’t be able to
didn’t have to
couldn’t
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9. You … use the office phone for private calls.
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mustn’t
must
aren’t able to
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10. Dealing with clients’ complaints is not my duty, but from time to time I do this.
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must
am able to
have to
Choose an appropriate modal verb.