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If you go to ___ post office, could you bring me ___ envelope?
A. a / the
B. the / an
C. the / the

Random Topics:
Adjectives and comparisonsLinking Verbs and TensesHabitual and Continuous TensesPreposition FormPast Tense and Past ContinuousIrregular AdjectivesTenseSpeech TensesPassive Voice - Present TensesPersonificationOther quiz:
Countable Noun › ViewMary always tells me that she wants to have _____ children.
A. Much
B. Many
Grammar › View
The production of paper not only requires many trees _____ emits a lot of greenhouse gases.
A. or
B. nor
C. and
D. but also
Comparatives › ViewI/ play/ tennis/ badly/ Tom.
A. I play tennis more badly than Tom
B. I play tennis badlier than Tom
C. I play tennis worse than Tom
D. I play tennis badder than Tom
Conjunctions › View
I have a cold. ____ I should stay at home.
A. Therefore
B. and therefore
C. Therefore,
D. and therefore,
