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One of _______ most serious environmental problems is _______ pollution.
A. the,zero
B. a,the
C. an,the
D. zero
Select your answer:
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Adverbs & to beClauses and GerundsPassive Voice Present SimpleSo Such Enough TooPresent Tense vs Present ContinuousModal Auxiliary VerbsIELTS VocabularyConditionals III - Mixed 1st, 2nd & 3rd ConditionalsModals for Recommendations
Other quiz:
Grammar › ViewBy the time Sarah ________ , I ________ the house.
A. called-had already left
B. had called-left
C. have left-has left
D. calls-left
Question tag and + - Agreement › View
my father was quite wise,…….?
A. wasn’t she?
B. wasn’t he?
C. was he?
D. were he?
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