[ Modal Verbs ]
In the past, robots had a _______ role, but they will play a very important role in the future.
A. useful
B. minor
C. complicated
D. dangerous

Random Topics:
Zero Conditional SentencePassive Voice with Modal VerbsVerb Forms and PrepositionsMixed ConditionalComparative & Superlative AdverbsVerb PhraseFOR & SINCEAdverb ClausesPassive with ModalsSimple Verb TensesOther quiz:
Grammar › ViewSara’s family went to the vegetable market, _________ they did not enjoy it.
A. and
B. but
C. or
D. so
Present Perfect Simple and Continuous › View
Marco ______________ sad and angry all day.
A. have seemed
B. has been seeming
C. has seemed
Sentences Function and Structure › ViewSurprise!
A. Exclamatory
B. Declarative
C. Negative imperative
D. Interrogative
Simple Past Tense › View
The Caribbean monk seal ____ the only species of seal that ____ made extinct by humans. It ____ declared extinct in 2008
A. was – was
B. was – is
C. is – was
D. is – is
