[ Vocabulary ]
______ is a chemical reaction between substances, which usually includes oxygen and produces heat and light.
A. Combust
B. Combustion
C. Combustible
D. Combusted

Random Topics:
Modals of DeductionAdverbs of frequencyTOEFL Adjective and AdverbPronouns and Subject Verb AgreementPast Perfect TenseSecond ConditionalsInfinitive or GerundGerund or to InfinitiveContrastive ConjunctionDefinite and Zero ArticleOther quiz:
Adjectives and Adverbs › ViewThe beach was beautiful, but __________ it rained almost every day
A. fortunately
B. fortunate
C. unfortunate
D. unfortunately
Preposition of Time › View
What time do you go to bed ________ night?
A. in
B. at
C. on
Past Tenses › ViewWe ___ our house for months before the floor tiles finally arrived.
A. had been decorating
B. had decorated
C. were decorating
D. decorated
Tenses › View
Thesa ___ a letter for her Idol yesterday
A. Writing
B. Writes
C. Wrote
D. Written
