[ Vocabulary ]
a poisonous gas made of 3 oxygen atoms
A. point source
B. nonpoint source
C. ozone
D. conservation
Random Topics:
Linking VerbSimple, Compound, Complex SentencesConditionalsAdverb of MannerGrammar - Present Perfect with already, just, yetInversions and SubjunctivePassive Modals in Different TensesSecond ConditionalsWord FormationModals of ProhibitionOther quiz:
Transitional Words › ViewThe phrase, futhermore, is used …
A. to show location
B. to compare and contrast
C. to conclude or summarize
D. to add information
Mixed General Quiz › View
Be careful not to walk on the ___ when it is wet because you might slip.
a. glass
b. grass
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