[ Grammar ]
They ______ their classroom.
A. cleans
B. clean
C. is cleaning

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If- ConditionalIrregular verbsAdverbEmployment VocabularyNoun, Pronoun, Adjective, VerbProgressive TensesGerund - to Infinitive Quantifiers with NounsPreposition & GerundQuestion TagOther quiz:
Modal Verb › ViewOur plane _______ in Cairo hours ago, but we haven’t even taken off from Heathrow yet.
A. was supposed to land
B. must have landed
C. ought to be landing
D. will have landed
Transition Words And Phrase › View
______ of her good grades, Rebecca did not get accepted to Stanford.
A. In addition
B. In spite of
C. As a result
D. On the other hand
E. Thereafter
You ______________ take any photos in the museum. It’s not allowed
A. can
B. must
C. should
D. mustn’t
Active & Passive › View
Sara …………………………. her keys.
A. was lost
B. lost
