In the given passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.

Comprehension:
In August every year, thousands of twins descend on a town in Ohio called Twinsburg, named by identical twin brothers 1.________two centuries ago. The Twins Days Festival is a threeday 2.________ consisting of talent shows and look-alike 3.___________that has become one of the world’s 4._____________ gatherings of twins. There have been 5.___________ festivals in Nigeria, a country where 1 in 22 births to the Yoruba people 6.__________twins, identical or fraternal, which is a much higher 7.__________than anywhere else in the world. This has been 8.___________to the eating of yams, but the theory is 9._____________. Biomedical researchers attend these events, regarding them as a 10._______________ opportunity to conduct surveys and experiments.