[ Grammar ]
Do you know what is the cause __________ pollution?
A. of
B. in
C. on
D. for

Random Topics:
Simple and Progressive Verb TensesPresent Simple and ContinuousModal PerfectModal Auxiliary VerbsInfinitives and GerundsMixed ConditionalsRelative Pronouns and AdverbsModal and Relative PhrasesModals for Advice, Obligation/Prohibition, Necessity and Lack of NecessityMixed GrammarOther quiz:
Spelling › ViewWhich is the correct spelling of the word…
A. Grateful
B. Greatful
Past Simple Tense › View
Jane _________ (close) the window this morning.
A. closeed
B. closed
C. close
D. closes
Phrasal Verbs › ViewYou _______ clothes that you want to buy.
A. fill in
B. give back
C. switch on
D. try on
Pronouns, Verb, Conjunction › View
Fill in the blank with the correct conjunction: “She likes to read books ___ watch TV.”
A. and
B. but
C. because
D. if
