Air pollution caused by industrial fumes "has" been studied for years, "but " only recently "has" the harmful effects of noise pollution "become" known.

A 1
B 2
C 3
D 4

Correct Answer: 3

The incorrect part of the statement is:"but" only recently "has" the harmful effects of noise pollution "become" known.The correct version should be:"but" only recently "have" the harmful effects of noise pollution "become" known.The verb "have" should be used instead of "has" to agree with the plural subject "the harmful effects of noise pollution." In this sentence, the subject is not "noise pollution" itself but rather its harmful effects. Since the subject is plural, the verb "have" is required.
Bissoy MCQ
#English #Corrections #Bank Asia Ltd #Bank Asia Ltd - Management Trainees - 17.06.2011

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