[ Grammar ]
In the past, the leaves of coffee plants _____ helpful in improving one’s health.
A. were thought to be
B. were thought as
C. are thought to be
D. are thought as

Random Topics:
Grammar - Present Perfect with for and sinceAdverb Of PlaceModal Verbs of Certainty and PossibilitySuperlative & Comparative AdverbsSubject and Verbs AgreementFuture Tense VerbVerbs & Verb TensesPassive SentenceModals TensesConjunctionsOther quiz:
Present Perfect and Simple Past Tense › ViewDaniel has ……… to United States, she said it´s winter there.
A. gone
B. been
C. went
D. were
Grammar › View
The boss is waiting for you. You _____ to be here half an hour ago!
A. have supposed
B. were suppose
C. are supposed
D. were supposed
Active vs. Passive Voice › View Which quotation used ellipses in a correct way?
I should not have said that.
A. ..I’m sorry.
B. I should not have said that …I’m sorry.
Idiom and Tenses › View
Determine the tense of the sentence: ‘They have been studying for hours.’
A. Present Perfect Continuous Tense
B. Past Simple Tense
C. Future Simple Tense
D. Present Continuous Tense
