[ Modals of Obligation and Permission ]
He —– stand on the plane. There are seats for everyone.
A. mustn´t
B. have to
C. doesn´t have to
D. muts
Select your answer:

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Modals of Deduction › ViewThe car does not start; there ____________ something wrong with the engine.
A. might
B. can’t be
C. must be
Aspect or tenses of Verbs › View
Which is Not an example of Perfect Progressive Aspect?
A. has been crying
B. had been laughing
C. will have been dancing
D. has happened
