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‘Who is at the door?’ ‘It …………………. be the postman.’
Question 1:
‘Who is at the door?’ ‘It …………………. be the postman.’
A.
must
B.
could
C.
Either could be used here
These questions are from this test. Would you like to take a practice test?
Auxiliary verbs exercise - Test 3 | Exercise follow Topic
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10 questions
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‘Who is at the door?’ ‘It …………………. be the postman.’
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