[ Modal Verbs ]
Passengers …….. check-in their bags before they fly
A. must
B. mustn’t
C. don’t have to
D. shouldn’t

Random Topics:
Relative & ModalsGrammar - Verb FormsFuture SimpleClauseVocabulary : Coming & GoingMixed ConditionalsMesopotamia VocabularyRegular Plural NounsPassive Voice - Present ContinuousPresent Perfect and Simple Past TenseOther quiz:
Tenses › ViewI……………..chess with him since I…………..here.
A. have played / moved
B. played / moved
C. play / move
D. played / have moved
Modal Verbs › View
You ___________ interrupt the customer when he’s talking. It’s impolite.
A. shouldn’t
B. don’t have to