[ Vocabulary & Grammar ]
Burning _________ will lead to release of carbon dioxide in huge amounts.
A. oil spill
B. fossil fuels
C. toxic waste
D. acid rain

Random Topics:
Verbs + Infinitives / GerundsQuantifiersSimple Present Continuous TenseAsking for and Giving OpinionPersonal Pronouns and VerbHave toPassive Voice Active VoiceModals and PhrasesVerb Types and TensesTransition WordsOther quiz:
Subject-Verb Agreement › ViewHe (has/ have) been my best friend since first grade.
A. Has
B. Have
Grammar › View
_______ they twins? They look the same.
A. Is
B. Did
C. Are
D. Was
He has _____ idea.
A. a
B. an
Past Perfect and Past Perfect Continuous Tense › View
What are the auxiliary verbs of the past perfect continuous tense?
A. has been
B. had been
C. was being
D. have been
