[ Modals ]
So far scientist have not ___ to successfully devise a mechanism
A. been able
B. need
C. must
Random Topics:
Narrative Tenses & ConditionalsVocab CheckingDemonstrative PronounGrammar RulesGerunds and InfitinitivesBe Going To vs. WillModal Verb Gerund or To InfinitivePresent ContinuousSpeculation with Modal VerbsFrequency AdverbsOther quiz:
Grammar › ViewAdmittedly, choosing the right modern design is not easy. ________ , the rewards for getting it right are much greater.
A. However
B. Although
C. Finally
D. Though
Prepositions › View
I love traveling _____ trains.
A. in
B. on
Grammar › ViewWhat is the correct abbreviation for October?
A. Octo.
B. Oct.
C. Oct
D. Octob.
Indefinite Pronouns › View
______ bought me a drink yesterday.
A. Something
B. Everybody
C. Someone
D. Somewhere