[ 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:
Grammar › ViewMany islands are below _______ and only the concrete walls can prevent them from disappearance.
A. human activity
B. greenhouse gas
C. sea level
D. ice cap
Grammar › View
I got lost in Riyadh but luckily I saw some _________.
A. stars
B. posts
C. sign
D. signposts
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
