[ Must / must not ]
You … switch your mobile phone on the plane.
A. must
B. mustn’t

Random Topics:
SentencesDo not- Does notInfinitivesSimple and Compound SentencesRelative & Interrogative PronounsPresent Simple and Continuous TenseGiving and Asking for AbilityAdjective ClausesVerb & GrammarPresent Perfect ContinuousOther quiz:
Conditional Sentences › ViewIf I had enough money, ……………………..
A. I will buy that house.
B. I’d have bought that house.
C. I could buy that house.
D. I can buy that house.
Modals › View
Oh, I ______ remember to get some potatoes on the way home tonight.
A. will must
B. will have to
C. need
D. will need
Grammar › ViewWe _____ in the school yesterday morning.
A. are
B. were
C. was
D. is
Modal Verbs › View
The new marketing strategy __________ boost our sales in the upcoming quarter.
A. can
B. might
C. will
D. would
