[ 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:
Simple Past Tense › ViewWhy didn’t they take you to the game?
A. Correct
B. Incorrect
Subject Verb Agreement › View
He could (has, have) blocked her along the way.
A. has
B. have
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
