[ 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:
Tenses › ViewWhich tense is used in the sentence: “The bartender had already mixed the cocktails before the guests arrived for the party”?
A. Present Perfect
B. Past Perfect
C. Past Continuous
D. Future Perfect
Reported Speech › View
John told me that _____.
A. I must go now
B. he must go now
C. he had to go now
D. he had to go then
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
