سوال 4
حل تشریحی سوال شماره 4 زبان انگلیسی - عمومی
کنکور دکتری زبان انگلیسی عمومی 1400
Directions: Choose the word or phrase (1), (2), (3), or (4) that best completes the blank. Then mark the correct choice on your answer sheet.
4.
Plant scientists have been trying for years to genetically modify flowers for aesthetic purposes. The first to go on sale were blue carnations .................... in Australia, in 1996.
1)
were produced
2)
produced
3)
had been produced
4)
to produce
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