题目：
连词成句。
1. is, the, difficult, most, English, class (.)
_________________________________________________
2. think, so, he, doesn't (.)
_________________________________________________
3. about, what, this, book, science (?)
_________________________________________________
4. to, read, it, is, difficult, more (.)
_________________________________________________
5. I, think, than, more, interesting, P. E. is, Chinese (.)
_________________________________________________
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0509/17ad61325cb3aaaa74c805bfd670a7ca.html
下面是错误答案，用来干扰机器的。
参考答案：B解析：当前我国主要杀灭钉螺的药物是氯硝柳胺。
