[ Vocabulary and Phrases ]
Rush hour is the time when ______.
A. most people are sleeping
B. traffic is the busiest
C. streets are empty
D. buses stop running

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Comparison & Modal Verbs in Passive VoiceGrammar - must & have toThere is, There are, Some, AnyPast Perfect & Past SimpleLinking Words and PhrasesGerundContinuous TenseUnreal ConditionalsTenses and Sentence CompletionAsking for and Giving OpinionOther quiz:
Grammar › ViewPeter _____ save his money if he wants to retire.
A. had better
B. was able to
C. was going to
D. was unable to
Modal Verbs of Possibility › View
The lights are off in the office. The workers ___ still be there.
A. must
B. might
C. can’t
D. could
