Grammar Quiz
[ Tenses ]

For decades, researchers _____ to wrest predictions from string theory, the leading candidate for a more fundamental understanding of the universe.

A. tried

B. were trying

C. have tried

D. try

E. had tried

Select your answer:
A  B  C  D  E 


Random Topics:

Tenses & AffixesAntonymsDeterminers & QuantifiersOpinion / Agreement-ing form and the to-infinitiveAdjective / Noun + to InfinitiveAdjective, Adverb, and Noun FormsPast or Present Verb TenseModals AuxiliaryPresent Continuous for Future

Other quiz:

Tenses › View

He __________ the football match every weekend.

A. watch

B. watches

C. watched

D. watching

Run-On Sentences › View

Run-On Sentence or Correct: Meet me at the courts we can play for an hour before dark.

A. Run-On

B. Correct

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