Grammar Quiz
[ Vocabulary ]

a poisonous gas made of 3 oxygen atoms

A. point source

B. nonpoint source

C. ozone

D. conservation

Select your answer:
A  B  C  D  E 


Random Topics:

Linking VerbSimple, Compound, Complex SentencesConditionalsAdverb of MannerGrammar - Present Perfect with already, just, yetInversions and SubjunctivePassive Modals in Different TensesSecond ConditionalsWord FormationModals of Prohibition

Other quiz:

Progressive Tense › View

He will not be…… at the library tonight,so he will not see jenny when she arrives.

A. Studying

B. Studies

C. Student

D. Study

Past Tense › View

Choose the Past Simple of this word.

teach

A. taught

B. teached

C. teaching

D. teachs

➤