清理外耳道时引起咳嗽是由于刺激了（）。
A.下颌神经耳颞支
B.迷走神经耳支
C.耳大神经
D.枕小神经
E.舌咽神经分支
参考答案：B
The population of Africa is __________ so rapidly as to cause concern of the whole world.[ ]
A. expanding
B. stretching
C. extending
D. spreading
-Do you know the boy________ is sitting next to Peter?
-Yes. He is Peter's friend. They are celebrating his ________ birthday.
A．who; ninth
B．that; nineth
C．/; nineth
D．which; ninth
