1 . Nong dropped out of school in 1986 because his family couldn't afford the______ ______.

2 . 看下列图片，补全文段。

With the development of the society, some Chinese students choose to study     1    . But before that, you should take many things into account, such as     2     and so on.

3 . Then Shenzhou 6 and 7 completed ________ and the first Chinese spacewalk, followed by the vehicle Jade Rabbit being sent to the moon to study its surface. (根据句意填空)

4 . A robot-arm from the Endeavour will grab the telescope and hold it while the astronauts ________.（根据句意填空）

5 . We can get ________ from large databases. We can download software, documents, and images whenever we need them.（根据句意填空）