Grammar Quiz

[ 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:
If vs. WhetherClick vs. Clique Simple Past Future Tense Conditional Sentence Type 0-3Adjectives & PrepositionState Verbs and Action VerbsPast Simple VerbsGerund or to InfinitivePresent Progressive

Other quiz:

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I think humans … on Mars one day.

A. are going to live

B. will live

C. live

Grammar › View

You __?__ study for the test.

A. better

B. had better

How to use : Read the question carefully, then select one of the answers button.