题目内容：

So many twins

Walk around Kodinji village and you’ll think that you have double vision. N1.knows why there are so many twins in the village of over 5,000 people.

In fact with about 35-45 twins per 1,000 live birth, this village in North Kerala, India, has four times more twins than normal. Based on door-to-door surveys, there are probably now a2.230 sets of twins in the village, locals said. That number doesn’t include five women pregnant (怀孕的）with twins.

The twins of 60 are the oldest twins in the village, while the youngest were born on June 10 this year. Being a twin is not always easy. Pathummakutty. a middle-aged woman, recalls how her family struggled for a 13.when she was a child. But she also r4.good times such as laughter after she was mixed up with her twin sister. At the local school, 15-year-old Salmabi said teachers often confused her for her twin sister and she was once scolded for something that her twin sister d5..

Scientists are still trying to uncover the mystery of w6. there are so many twins in the village. “Based on scientific facts, we feel something in the environment is causing this. It could be something in the water,” said a 17. doctor, M.K. Sribiju. The locals also believe it is to do with the water. Kodinji is surrounded by clear water in the small river.

As scientists try to find the r8. for the large numbers of twins in the village, the parents are busy trying to tell their children apart. While parents lightheartedly point out that their twins even seem to fall sick together but not all traits (特性）are s9.The twins Anu and Abhi prefer different film stars and one of the boys likes to play tennis, w10. the other prefers kicking a soccer ball.