[ Grammar ]
– “When_______?” -“In 1928.”
A. penicillin was discovered
B. penicillin discovered
C. was penicillin discovered
D. did penicillin discover

Random Topics:
Relative PronounNouns FormationDependent PrepositionPossessive Adjectives VS Possessive PronounsPrepositionPresent Simple VS ContinuousPreposition of TimePrepositionsNumbersGrammar and VocabularyOther quiz:
Phrasal Verbs › ViewMy diet’s going OK, but _____ bread has been really difficult.
A. giving up
B. finding out
C. putting on
Past Tense › View
Ali _______ his new car to his mother’s house.
A. drove
B. drive
C. driving
Articles › ViewCan you recommend _____ good restaurant?
A. a
B. an
C. the
D. –
Present Progressive Tense › View
I _______ a sandwich now.
A. am eating
B. is eating
C. are eating
D. eats
