[ 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:
Conjunctions › ViewDo you want to eat sushi ___________ tacos for dinner?
A. and
B. but
C. because
D. or
Grammar and Vocabulary › View
. The teacher told me to close _____ door and sit down.
A. the
B. –
C. a
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
