（）
A．A
B．B
C．C
D．D
参考答案：B
He was annoyed for _________ outside while his wife was shopping with the key.[ ]
A. being kept
B. keeping
C. kept
D. to be kept
正常食管壁厚度大约为（）
A、1mm
B、3mm
C、5mm
D、4mm
E、以上均不是
（） 
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