47. Sky-diving takes a lot of courage. The reason people do it is to test themselves in difficult
situations. (A) A sky-diving school can teach you how to use a parachute and how to land
without broken bones. (B) I read that up to twenty people can jump together, join up and form
patterns in the sky. (C) Each of them has to know exactly when to jump and be able to speed up
or slow down their descent. (D) Bungee jumping would be very scary.
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