[ Noun and Modal Verbs ]
Passengers _____ check in online, but they _____ arrive at least 2 hours before international flights.
A. must, needn’t
B. don’t have to, must
C. have to, mustn’t
D. needn’t, have to

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Grammar - FutureDeterminersIndefinite PronounsGerund and InfinitivesModals and InversionMix-TensesArticlesQuantifiers and ArticlesBe Going To vs. WillAdjectives, Adverbs, and PrepositionsOther quiz:
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I …… him only one letter up to now.
A. sent
B. have sent
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It rained all day. It was the ___________ day of the holiday.
A. most bad
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C. worse
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A. learn
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They ________ doing housework.
A. hating
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C. hate
