题目：
根据句意,补全单词.
1. We can't find the good to show our thankful to you for giving us so much help.
2. Some germs are very ___ _, so we must see them with the microscope.
3. Many people think it is not good to keep the wild animals in the ____.
4. Don't forget to ____ the dog or he may be hungry.
5. A lot of parents _ __ the government to care for teenagers getting online through their mobile phone.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：由苯丙烷单元通过醚键和碳碳键连接而成的，具有三度空间结构的复杂的高聚物。木质素和半纤维素在一起，填充在细胞壁的微纤丝之间，同时也存在于胞间层。
