[ Past Modals ]
___ to call me back?
A. Could he have forgotten
B. May he have forgotten
C. Must he have forgotten

Random Topics:
ConjunctionsCountable & Uncountable NounsGrammar : Must (Necessity)Active vs. Passive VoiceGerunds, Infinitives and Modals of PossibilityGerunds/InfinitivesDistinguishing Future TensesCollective NounsPreposition after some VerbsConjunctive Adverbs and PunctuationOther quiz:
Prepositions › ViewThis book belongs ___ my sister.
A. to
B. with
C. in
D. for
E. about
Grammar › View
Why _____ to come to the concert?
A. don’t you want
B. you don’t want
C. you not want