[ Grammar ]
That _______ be Mike calling. He’s in Italy.
A. should
B. must
C. might
D. can’t

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Grammar › ViewWhat is the preposition?
Over the years we have learned to study
hard.
A. the
B. have
C. to
D. over
Vocabulary › View
something that needs great mental or physical effort in order to be done successfully
A. easy
B. challenge
C. win
D. hard