[ Passive Voice ]
The new chemical _________ when it exploded.
A. was testing
B. had being tested
C. was being tested

Random Topics:
Past Continuous vs Past SimpleHelping and Linking VerbsQuantifiers / Prepositions of Time and Comparative AdjectivesSentence Structure and Grammar RulesPresent Continuous for FutureEs and SGrammar-Verbs & Nouns Singular, Plural, GenderSimple, Complex, Compound SentencePrepositions and AdverbsModal Verb, Passive VoiceOther quiz:
Grammar › ViewI’m going to the supermarket … some orange juice.
A. buy
B. buying
C. to buy
Present & Past Tenses › View
Choose the correct answer:
She … tea at 5 o’clock on Saturdays.
A. Have
B. Has
C. Had
D. Was having
Intermediate Grammar › ViewHe went to the Stadium ….. taxi.
A. BY
B. ON
C. IN
D. WITH
Active vs. Passive › View
This policeman …… that man.
A. Was arrested by
B. Arrested for
C. Arrested
D. Will be arrested
