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

Random Topics:
Adverbs of DegreeGrammar PhrasesPhrase or ClauseComparison & Modal Verbs in Passive VoiceSimple vs Continuous Past TenseCountable & Noncountable NounsGerund - to Infinitive Tenses UsageCountable QuantifiersActive Voice-Present tenseOther quiz:
Grammar › ViewHe was sitting … the tree when it started raining.
A. above
B. under
C. between
D. like
a, an, the, Zero Article › View
We offer 128-bit encryption for __ Dedicated SSL.
A. A
B. An
C. The
D. No article required
they are long and shar claws that help a bird of prey kill and carry things
A. talons
B. tails
Grammar › View
John: “I’m going to the Long Beach.”
John said that he ______ to the Long Beach.”
_____
A. is going
B. was going
C. went
D. had gone
