[ 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:
Helping and Linking Verbs › ViewWhat is the helping verb in the following sentence? I am looking forward to our vacation to Disney World.
A. forward
B. looking
C. am
D. our
Grammar › View
What is the interjection in this sentence:
Wow, I can’t believe you fell for that joke.
A. Wow
B. can’t
C. believe
D. joke
She 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
