[ General Knowledge ]
What gas do we need to breathe to stay alive?
A. Nitrogen
B. Carbon Dioxide
C. Oxygen
D. Argon
E. Sulphur dioxide

Random Topics:
ConnectorsGerund NounModals of PredictionRelative PronounsModals of Necessity and SuggestionVerbs & Verb TensesWho am I?Conjunctive AdverbsPresent Simple TenseGrammar and PunctuationOther quiz:
Demonstrative Pronouns and Verb Tenses › ViewWe ____ in a small town.
A. lives
B. live
C. living
D. are live
Tenses › View
We __________ all day, so we decided to rest.
A. had been hiking
B. have been hiking
C. were hiking
D. hike
Grammar › ViewThis homework is ______ than the previous one.
A. a harder
B. a little
C. a little harder
D. a harder little
Grammar › View
He is very tired______ he did not sleep last night.
A. since
B. although
C. because
