[ Modals Verbs ]
I’m sure she forgot the appointment.
A. She must have forgotten the appointment.
B. She could forget the appointment.
C. She could forget the appointment.
D. She must forget the appointment.

Random Topics:
Pronoun Antecedent AgreementModal Auxiliaries and To Be VerbsIdiom and TensesGerund or to InfinitiveGrammar AssessmentSubordinating Conjunctions and ClausesFuture Tense - will and going toPresent Progressive or Present SimpleSimple Present & Present ProgressiveTime ConjunctionsOther quiz:
Perfect Verb Tenses › ViewWhich sentence is in the future perfect tense?
A. He will have left by the time you get here.
B. He has left.
C. He had left.
D. He leaves.
Grammar › View
I eat ________ chocolate.
A. too much
B. too many
C. as many as
D. so
Verbs & Phrasal Verbs › ViewLet’s _______ that old box. We don’t need it.
A. throw up
B. throw in
C. throw off
D. throw away
Grammar › View
It was a hot day _________ we still had a fun time by the beach.
A. so
B. but
C. and
D. although
