[ Modals for Obligation ]
You __________________ use the cellphone at the theater or cinema.
A. must
B. mustn’t

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Conjunctions and TransitionsModal Verb Gerund or To InfinitivePRESENT SIMPLE - CHILDREN1st ConditionalGerund & ParticipleTenses: Present simple, Past Simple, Future SimpleModal Verbs for SpeculationThe Structural Types of SentencesVerbs and Tenses3rd Person SingularOther quiz:
Conjunction › View_____ he knew the answer, he would not tell us.
A. until
B. since
C. although
Vocabulary & Grammar › View
Many ethnic groups find it difficult to ________ their own language or preserve their culture.
A. change
B. integrate
C. maintain
D. learn