题目内容

The lost traveler was filled with __________ when he saw a bear (熊) running toward him.

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When you’re away from your family, you have to be __________ for yourself.

At first, he was afraid of being off by himself. Shortly, __________, he became used to living alone.

Children in China __________ school at the age of 6 or 7 and must study there for at least nine years.

The earth is __________ by air, which makes up its atmosphere (大气层).

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