[ 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
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 FutureOther quiz:
Grammar › ViewShe _____ a beautiful cat.
A. have
B. has
C. have to
D. has to
Simple Past vs Past Continuous Tense › View
After a while, the sun _________ out again.
A. comes
B. came
C. was coming
D. coming
Tenses › ViewHe __________ 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