8. We are oblige to attend the seminar so we ______register now
A.have to
B.can't
C.musn't
D.Can
9. There's a lot of noise coming from outside._______I close the window?
A.can
B.can't
C.Shouldn't
D.must
10. did they tell you that you.________
come into this area. it's restricted to staff only
A.can't
B.could
C.are allowed
D.Can
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Answer:
8.A have to
9.A can
10.C are allowed