[ Modal Verbs ]
We . . . cancel our reservation 24 hours in advance. The hotel manager told us.
A. are supposed to
B. were supposed to
C. is supposed to
D. was supposed to

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Prepositions › ViewYou should have replied … his invitation sooner.
A. on
B. in
C. at
D. to
Grammar › View
He didn’t understand at all what I did say.
A. correct
B. incorrect
