参与大脑动脉环组成的动脉有
A. 前交通动脉
B. 大脑前动脉
C. 大脑中动脉
D. 大脑后动脉
E. 后交通动脉
海绵窦内通过的结构有
A. 动眼神经
B. 视神经
C. 展神经
D. 颈内动脉
E. 上颌神经
— Why did the dog bark?— ________ its owner he forgot to feed him.
A. Telling
B. To tell
C. Told
D. Tell
It is not so easy to pick ________ a good toy for her son.
A. out
B. up
C. from
D. off