Task 9
Are Bats Really Blind?
The expression “blind (49)_____ a bat” is completely inaccurate because bats aren’t blind. They (50)_____ see reasonably well with their eyes (in laboratory tests they have been shown (51)_____ shapes and colours), and when it (52)_____ dark they navigate using a sophisticated sonar (53)_____ called echolocation.
A View from Space
The Great Wall of China isn’t visible from the moon with the naked eye. Space begins about sixty miles from Earth’s surface, which is (54)_____ close. The British astronomer Fred Hoyle (55)_____ to have remarked, “Space isn’t remote at all. It’s only an hour’s drive away if your car (56)_____ go straight upwards.” From this short distance away, it is possible to pick out many man-made objects such as motorways, railways, cities, fields, and the Great Wall. However, you only have to travel (57)_____ few thousand miles away before all man-made objects (58)_____ from view.
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