[ Modal Verbs ]
It’s a good idea you visit a doctor.
You ____________ visit a doctor.
A. Must
B. Should
C. Can
D. Don’t have to

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Grammar › ViewMum _____ be surprised that I got an A for my exam.
A. can´t
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Adjective Clauses › View
The airplane _____ frightened the students was flying very low over the school
A. whom
B. whose
C. which
D. who