[ Modal Verbs ]
No one knows exactly who were the first Americans, but scientists exploring caves have found evidence that they _____ from Asia.
A. should have arrived
B. would have arrived
C. must have arrived
D. ought to have arrived
E. have arrived
Select your answer:
Random Topics:
Present Perfect Adverbs and Indirect QuestionsEnglish for TourismGrammar - may/might/couldFirst and Second ConditionalParticiple Clauses & Cleft SentencesModal Verbs in First ConditionalPrepositions and ArticlesComparatives - SuperlativePast Simple Negative & QuestionsComparatives and Past Perfect TenseOther quiz:
Grammar: Used to, Would, Be used to, Get used to › View___ help prepare dinner when you were younger?
A. Did you get used to
B. Did you use to
C. Were you used to
Prepositions › View
… behalf of
A. at
B. in
C. on
D. from