单细胞动物变形虫没有运动结构，通过漂浮寻找食物。

完成句子。
1. It's not just because they ____（不能理解它是什么意思）.
2. F 2 F ____ （表示面对面）.
3. Homophone often use letters and numbers that ____（听起来像单词或单词的一部分）.
4. I don't think twelve-year-olds should be allowed to ____ （穿耳洞）.
5. I think teenagers should be allowed to____（与朋友们外出）.
6. If we can't wear our own clothes, we should be allowed to____ （设计自己的校服）.
7. I get nervous before big parties and then I ____（出皮疹）.
8. It isn't good to borrow your friends' books ____ （未经允许）.
 9. My life ____（有了很大的改变）in the last few years.

如图，平行四边形ABCD中，D点在抛物线y= $\frac{1}{8}$ x²+bx+c上，且OB=OC，AB=5，tan∠ACB= $\frac{3}{4}$ ，M是抛物线与y轴的交点．