[ Perfect Modals ]
She doesn’t understand the question. She ____ been listening carefully.
A. should have
B. must have
C. can’t have
D. needn’t have

Random Topics:
Grammar - Be going toAdverbsComparison Degree & GerundsSuffixes (ing-ed) SentencesModal Verbs and PermissionSimple Past Tense and Present Continuous TenseA/AnConditional TypesArticles & PrepositionNoun PhraseOther quiz:
Vocabulary › ViewIn the absence of Government control, there were murders, robberies, and general ___.
A. Anarchy
B. Aggregate
C. Asylum
D. Abstain
Grammar › View
Any possible academic assistance from taking stimulants _____ marginal at best.
A. it is
B. there is
C. is
D. as
Grammar › ViewThe door _______ wide open so I walked in.
A. was
B. is
C. were
D. are
Simple Past Tense › View
Which is the correct structure of Past Simple Tense?
A. S + V1
B. S + V to be + -ing
C. S + V2
D. S + Will + V1
