[ Grammar Present Perfect (ever never) ]
A: Have you ever __________ (think) about making a robot?
B: Yes, I have.
A. think
B. thinked
C. thinking
D. thought

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Verb Tenses and UsageGrammar and PrepositionFamily VocabularyActive & PassiveCountable and UncountableSentence Types and ConjunctionsVerbs & Verb TensesActive Voice-Present tenseParallelism and Subject Verb AgreementSimple Present - Negative & InterrogativeOther quiz:
Grammar › ViewMary lives here,
A. doesn´t she?
B. does she?
C. is she?
D. doesn´t Mary?
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The voice ____ not _________ anymore.
A. could, be heard
B. could, hear
C. both are suitable answers
Verb Conjugation › ViewYesterday I _______ my juice.
A. drink
B. drank
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Call your parents ___ they will start to worry.
A. if only
B. otherwise
C. if so
D. in case
