[ 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:
Modal Verbs › ViewHe ___ tidy up, it’s his duty.
A. must
B. have to
C. had to
D. could
E. should
Perfect Tenses › View
We …….(do) an English online class after this pandemic situation.
A. will have done
B. do
C. have do
D. have did
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
