[ Subject Verb Agreement ]
The build-up of gases in the air from burning large tracts of forest ______ to global warming.
A. contributes
B. contribute
Select your answer:

Random Topics:
Modals of PredictionConditionals 1,2,3Passive VoiceVerbal and Appositive PhrasesFuture Continuous TenseCompound and Complex SentencesLexico and GrammarFuture Tenses, Conditionals and ProfessionsVocabulary and PrepositionsTime ClauseOther quiz:
Grammar TOEFL › View“I met Dr. Sitorus last week.”
“You mean the man _____ you the letter of recommendation for your scholarship?”
A. give
B. to give
C. giving
D. to be giving
Vocabulary › View
What is the antonym of admired?
A. Dislike
B. love
C. think this person is amazing
D. think this person is lame
