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

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

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

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Best Answer Explained in Below-:

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.

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

In many "respects" Anna Karenina and Emma Bovary "are" similar characters,but Bovary "has" "the most spirit" and determination .

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