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Instructions:

Q1 - That's ridiculous- you ____ be joking.
can
must
Q2 - That's the phone- who ____ it be?
can
must
Q3 - They haven't eaten for hours- they ____ be starving.
can
must
Q4 - I'm busy this morning, but I ____ see you this afternoon if you like.
can
must
Q5 - It ____ be the postman; it's far too early.
can't
mustn't
Q6 - You ____ enter the country without a visa.
can
must
Q7 - They're two hours late- there ___ be something wrong.
can
must
Q8 - She left two hours ago, so she ____ have arrived by now.
can
must
Q9 - My doctor says I ____ lose some weight.
can
must
Q10 - ____ you smell something burning?
Can
Must

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