题目内容：

A) 根据句意和所给汉语提示，填写正确的单词(每空限一词)

1.Ten years ago, the Greens lived in a__________(洞穴).

2.How amazing! The two-year-old American boy can use_________(筷子) so well.

3.The twins want to be ______________ (飞行员) when they grow up.

4.Although it was raining cats and dogs, the plane ______________ (着陆) safely.

5.He__________(搁置)all his work aside and started to play with his daughter.