[ Must / must not ]
You … be rude to your parents
A. must
B. mustn’t

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Definite ArticlesNoun, Verb, AdjectiveModals for RecommendationsGerund, Infinitive & ModalsPresent Simple & Present ContinuousStative Verbs and TensesCommon ErrorAdjectives and comparisonsAdjective ClauseAuxiliary WordsOther quiz:
Vocabulary › Viewa device that has electrical resistance and that is used in an electric circuit for protection, operation, or current control
A. resistor
B. utilities
C. appall
D. assessment
Prepositions of Time, Place, and Movement › View
The bus is coming… the street.
A. towards
B. over
C. down