[ Modal Verbs ]
You ………. be quiet in the library.
A. must
B. mustn’t
C. should
D. shouldn’t

Random Topics:
Modals in the PastPresent Perfect Negative and InterrogativeGerunds as objects of prepositionContinuous TenseGerunds, Infinitives and ParticiplesModals and ConditionalsVerb Moods and Vague PronounsVocabulary and IdiomsHave to/Has toCollective NounsOther quiz:
Prepositions › ViewWe went to the library to revise ____________ our final exams.
A. in
B. on
C. to
D. for
Have as verb and auxiliary › View
We _________ a new puppy at home!
A. have had
B. has
C. had
D. have
Grammar › ViewHe said that he ___ (not be) at home the day before.
A. hadn’t been
B. wasn’t
C. isn’t
Cohesive Devices › View
The house is very expensive, _______ I could not buy it.
A. yet
B. so
C. but
