5 . 阅读下面材料，在空白处填入适当内容 (1个单词) 或括号内单词的正确形式 (1个或几个单词)。
1. We can’t get good grades ________ we study hard.
2. ―I’ve finished my homework. How about you, Gina?
―I haven’t started ________.
3. The boy is not so ________ (hard-working) as his brother.
4. ________ (successful) comes from hard work.
5. My grandmother encourages me ________ (learn) to do housework to help my mother.
6. ________ (be) honest, she is an excellent student.
7. My sister loves reading books, ________ (special) science fiction.
8. Qomolangma is one of the ________ (high) mountains in the world.
9. ―Can you give me some advice about our vacation trips in September?
—Why not consider ________ (visit) Jiuzhaigou Valley?
10. Mother won’t go to bed until she ________ (finish) her housework.
11. The kind woman always helps the ________ (home) children.
12. Yu Gong kept ________ (try) and didn’t give up.
13. There are many ________ (tour) in Beijing every day.
14. I ________ (run) with my friend at 5:30 yesterday afternoon.
15. ―Jenny, your new soft toy looks very beautiful.
—Oh, it is not new. I ________ (have) it since three months ago.