Imaging this: you wake up each morning to find your sister lying beside you, to get dressed and tie your shoes, you use one hand and she uses another. You do everything out together, too, even sitting on the same chair at lunch and (1)___________________.
That’s what life is like for six-year-old Betty and Abby. Like most twins, the two girls look very much alike, (2)_______________, Betty and Abby share parts of the same body.
Twins like Betty and Abby are rare. Only about 40 sets are born in the United States each year. Few survive as long as Betty and Abby. That’s because twins (3)__________________________.
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作者: oralex 时间: 2016-8-23 09:17
riding on the same bycicle
but unlike most teins
often share vital organs like heart and brain
