The engineers _________ (invent) a new system for transporting water last year.
A. invented
B. was inventing
C. had invent

Random Topics:
Subordinating ConjunctionVocabullary TestSuffixes (ing-ed) SentencesModals for ObligationAuxiliary WordsPronouns, Verb, ConjunctionGerundIdiomsPoetryWas & Were QuestionsOther quiz:
Subject-Verb Agreement › ViewWhich of the following sentences demonstrates correct subject-verb agreement? Choose one.
A. Walter and Sam, members of the Teen Beat Club, conducts meetings on Monday nights.
B. My father claims that all work and no play makes unhappiness!
C. A good chef using proper equipment make dicing an onion look easy.
D. One of the finalists, Mary Kilgore, has become a famous movie star.
Grammar › View
Don’t. ………..to come early next time.
A. Forget
B. Remind
C. Remember
D. Miss
It means to start doing an activity, hobby, etc…
A. start up
B. look up
C. give up
Grammar › View
My students __________ a new chapter in The Green Meadows next week.
A. reading
B. were reading
C. will be reading
D. is reading
