根据句意首写字母填单词。 1. It's a ________ (秘密) bet

问题：

根据句意首写字母填单词。

1. It's a ________ (秘密) between you and us. Don't tell anybody about it.

2. As students, it's our d________ to study hard at any subjects.

3. My grandfather died last month. His d________ made me very sad.

4. Bruce is old enough to look after h________ (他自己).

5. I don't know the right p________ of the word Jane

6. You should try your best if you want to ________ (实现) your dream.

7. If I had 5 million dollars, I would give it to medical ________ (研究).

8. Our teacher often tells us the ________ (重要性) of learning English.