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 › ViewWho taught you ______ this complex software so quickly? It’s quite impressive.
A. using
B. use
C. to use
D. used
Passive Voice › View
“I really don’t want to do the laundry. Maybe I should ask dad to do it for me.”
Which sentence has the same meaning with the underlined?
A. Maybe I should have the laundry done by dad.
B. Maybe I should have asked the laundry.
C. Maybe I should have done the laundry.
D. Maybe I should do it for dad.
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
