阅读下面语段，按要求回答问题：

科学研究总是把人们当做完全理性的对象，这样逻辑的方法       有效。但具体证人，都是活生生的，有情感的，有许多非理性的东西。       的理论的逻辑方法，难以避免现实上的失误。

填入横线部分最恰当的一项是（   ）。

A．总会单纯

B．才能单纯

C．总会简单

D．才能简单

介/副词填空。

1. We get along well ____ each other.

2. They fell ____ love with each other at first sight.

3. Please add some water ____ the soup.

4. The boy calmed ____ when he saw his mother.

5. His line is still busy so I can't get ____.

6. I don't think he hurt Tom ____ purpose.

7. Something must be done to stop some factories ____ polluting the environment.

8. According ____ the survey, half of the men in that village smoke.

9. He is ill now, so he suffers ____ a headache very much.

10. He always shows great concern ____ the workers.