[ Modal Verb ]
By the time we arrive, they _____ left
A. Must have
B. Can have
C. Might have
D. Should have

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Modal Verbs in ConditionalsParallel Structure or Combining SentencesAdverbs, Prefixes, and SuffixesTime Clauses of FutureGerund or to InfinitiveHelpful Phrases Pronounciation and GrammarConditionals Type IPrepotitionsPhrasal Verb and ModalOther quiz:
Vocabulary › ViewI pledge — to the flag of the Vietnam. I swear to be loyal to my own country.
A. allegiance
B. abating
C. equivalent
D. resistance
Adverbial Clause of Cause and Effect › View
Identify the adverbial clause in the following sentence:
“I knew that I had come face to face with someone whose mere personalist was so fascinating that, if I allowed it to do so, it would absorb my whole nature, my whole soul, my very art itself.”
A. I knew that I had come face to face with someone whose mere personalist was so fascinating that
B. if I allowed it to do so, it would absorb my whole nature
C. my very art itself
D. my whole soul
