Choose the correct sentence using ‘must’ for obligation:
A. You must to wear a uniform.
B. You must wearing a uniform.
C. You must wear a uniform.

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Bare Infinitive and To InfinitivePresent Simple and ContinuousGrammar & VocabularyFamily Members and Present SimpleMay, MightIF CLAUSEPreposition of TimeAdjective vs AdverbInfinitiveArgumentative VocabularyOther quiz:
Grammar › ViewWhen the cat is away, the mice will play.
A. A person who comes early has more advantage than someone who is late.
B. You can only judge if something is good or bad when you have tried it.
C. When the boss is away, the workers do not do their work properly.
D. A foolish person spends his money carelessly and soon becomes poor.
Grammar › View
She got a terrible mark in the exam so she …… very hard at all.
A. mustn’t have worked
B. can’t have worked
C. didn’t work
Vocabulary › ViewTo draw a conclusion from fact; to infer
A. motive
B. sleuth
C. complexity
D. deduce
Vocabulary & Grammar › View
My mother ________ in the supermarket all afternoon.
A. has been working
B. has worked
C. is working
D. works
