[ Grammar ]
You … switch on your phone until the plane has landed.
A. don’t have to
B. mustn’t
C. must
Select your answer:

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Vocabulary and ModalsAdjective, Adverb, and Noun FormsMix-TensesPhrasal Verbs and GrammarGrammar - much, many, a lot ofTime PhrasesPresent Continous TenseWill & Be going toMuch, many, a lot of, a few, a littleModal Verbs & Reflexive PronounsOther quiz:
Question Tags › ViewHis school report wasn’t good,
A. did he?
B. didn’t he?
C. was it?
D. wasn’t it?
Gerund or Infinitives › View
I spilled my coffee so I had to stop…
A. to clean it up.
B. cleaning it up.
C. to cleaned it up.
