根据句意和汉语注释写出正确单词，完成句子。

1. The boys from Class 1 were              (不开心的) because they lost the game.

2. The maths               (问题) is very hard,so you'd better ask for help.

3. Mary has               (差的) eyesight because of watching too much TV.

4. Betty looks like her father with a              (正方形的) face.

5. They are getting ready for the English              (测试) these days.

6. My uncle often gives me some              (建议) to learn English well.

7. China is              (著名的) for the Great Wall.

8. It's              (真实的) that a dog helped an old man out of a fire.

9. My mother is kind, and she always shares her              (欢乐) with her friends.

10. Tom's favourite sport is              (潜水).

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