[ 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:
Pronouns, Sentence Structure, and Apostrophes › ViewAfter rescheduling three meetings, the president herself conducted the meeting.
A. Reflexive
B. Intensive
Grammar › View
My birthday is ____August 20th.
A. in
B. on
C. at
D. later
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
