1. [单选题]Let us hope we can settle the matter without ______ more trouble.
A. any
B. a little
C. some
D. little
2. [单选题]关于反射的论述，下列选项错误的是 （ ）
A. 完成反射所必需的结构基础是反射弧
B. 在反射进行过程中可以有体液因素参与
C. 反射是实现神经调节的基本方式
D. 同一刺激所引起的反射效应应当完全相同
E. 完成一个反射必须有(must have)中枢神经系统参与
3. [单选题]Mary's parents are worried about Mary because no one was aware ______ she had gone.
A. of where
B. where that
C. the place
D. where of
