YDS TENSES / TEST 7 4. Soru

Bu Testin Birincisi missbeliever

100 %

4.

- Although a number of nuclear power
plants ....... safely for years, public
concern about the potential dangers
of nuclear power ....... it from
becoming a major electricity
producer.

have been operating/has prevented

are operating/prevented

had operated/will prevent

operated/had been preventing

were operating/was preventing

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