[ Grammar TOEFL ]
A machine _____ could monitor efficiency would be very useful.
A. whom
B. that
C. it
D. when

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Present Tense vs Past TenseTenses and ArticlesPast Simple Negative & QuestionsFuture TensesPrepositions Of PlaceMoods of GrammarIndependent ClausesGrammar - Present Perfect with already, just, yetConjunction: Because and SoModal Auxiliaries and To Be VerbsOther quiz:
Tenses › ViewDuring the 18th century, elements of Enlightenment thinking ___ in the American, French, and Haitian Revolutions.
A. culminated
B. have culminated
C. were culminating
D. had culminated
Grammar › View
‘Shall we try the new café in town tomorrow?’
‘Yes, but it … until noon.’
_
A. opens
B. doesn’t open
C. opened
D. is opening
Tag Questions › ViewShe is collecting stickers, ……………..?
A. is she
B. does she
C. isn’t she
D. doesn’t she
Past or Present Verb Tense › View
Which vocab word matches this definition:
When two or more things rely on each other to work.
A. Systems
B. Interdependent
C. Interrelated
D. Food security
