[ Must / must not ]
You… obey the traffic rules.
A. must
B. mustn’t

Random Topics:
SubjunctivesSingular and Plural NounsFuture - Will and Be going toPast ModalsPresent Continuous for FutureSecond and Third ConditionalPossessive PronounsPersonal PronounClauses of ReasonDirect-Indirect SpeechOther quiz:
Tenses › ViewIt was getting late and Eric LeMarque decided to have one final run on his snowboard. As he … down the mountain, he came across a thick fog and headed in the wrong direction.
A. ‘d gone
B. was going
Grammar › View
All of the ______ in our choir have come down with laryngitis.
A. altos
B. altoes