[ 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:
Grammar › ViewSome bonsai collectors __________ for bonsai plants in jungles.
A. look
B. looks
C. looked
D. looking
Grammar › View
They _____ at this conference for the last two days.
A. have been
B. were
C. are
D. be
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
