[ Passive Voice ]
Christopher Columbus discovered America in 1492.
A. America was discovered by Christopher Columbus in 1492.
B. America were discovered by Christopher Columbus in 1492.
C. America is discovered by Christopher Columbus in 1492.
D. America wasn’t discovered by Christopher Columbus in 1482.

Random Topics:
Modals and Semi-ModalsPRESENT SIMPLE - CHILDRENModals AuxiliaryAdverbs of Manner, Likes and PreferencesTenses and ArticleGrammarSubject-Verb AgreementIndefinite and Definite ArticlesLet & Be allowed toPronounsOther quiz:
Grammar › ViewConcentration is ________ by alertness.
A. Help
B. Will help
C. Helps
D. Helped
Past Perfect Tense and Past Tense › View
When we were in elementary school, we ……… (not/learn) past perfect tense before we got English course.
A. have learnt
B. had not learnt
C. were learning
D. have not been learnt
Grammar › ViewIt’s a secret. You__________let anyone know about it.A.
A. mustn’t
B. needn’t
C. Mightn’t
D. may not
Grammar › View
They ____________ speak French.
A. don’t
B. doesn’t
