. Which sentence uses a modal verb to express a strong obligation?
A. You might want to check your email.
B. They can join us for dinner.
C. She must wear a uniform to school.
D. He will visit his grandparents.

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Phrasal VerbsIn/On/At + TimeDefinite pronouns (Subject, Object, Reflexive)Auxiliary Verbs1st ConditionalConnectorsThe Simple Present TenseGrammar - help/have/let/makeSuperlative & Comparative AdverbsThe -ing Form of VerbsOther quiz:
Grammar › ViewEducation in Chile _____________ since the government reform in 1960s.
A. Has many improvements
B. Been improved
C. Has an improvement
D. Has improved
Tenses › View
Choose the correct tense for the following sentence: ‘I am reading a book right now.’
A. Present simple tense
B. Past simple tense
C. Future continuous tense
D. Present continuous tense
Subject-Verb Agreement › ViewEach (serve / serves) a different purpose.
A. Serve
B. Serves
Grammar › View
People should use ______ nuclear energy.
A. People should use too many nuclear energy.
B. People should use too much nuclear energy.
C. People should use fewer nuclear energy.
D. People should use less nuclear energy.
