Topics: 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:
Relative Pronouns and AdverbsAuxiliaries VerbPhrasal VerbIf/Unless - Conditional type 1Transportation VocabularySimple Present and Present Continuous TensesPerfect TensesTo Infinitive or GerundPresent Simple and Continuous TenseQuestion TagOther quiz:
Conjunctions › ViewA dog can run _____ cannot fly.
A. and
B. but
C. because
D. or
E. so
Conjunctions › View
I use this broom …. cleaning the floor
A. for
B. in order to
C. so that