学校举行图片展,其中有下面三幅图片,请你给这些图片配上标题,你认为最恰当的是(    )

根据短文内容, 选择正确答案。

    If you go into the forest with friends, stay with them. If you don't, you may get lost. If you get lost, this is what you should do. Sit down and stay where you are. Don't try to find your friends. Let them find you. You can help them find you by staying in one place. There is another way to help your friends or other people to find you. You can shout or whistle three times. Stop. Then shout or whistle three times again. Any signal given three times is a call for help.

    Keep up shouting or whistling. Always three times together. When people hear you, they will know that you are not just making a noise for fun. They will let you know that they have heard your signal. They will give you two shouts or two whistles. When a signal given twice, it is an answer to a call for help.

    If you don't mind that you will get help before night comes, try to make a little house with branches. Make yourself a bed with leaves and grass.

如图为“台湾岛主要农矿产品分布图”，下列有关台湾的说法，正确的是（  ）

The computer,        help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20^th century.

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烦恼—____   费劲—____   究竟—____