诊断早期胃癌最重要的检查方法是（）
A.X线钡餐检查
B.胃镜检查
C.AFP
D.大便隐血试验
E.CEA
参考答案：B
When the clock ________ 11, I was about to leave for the supermarket.
A．knocked
B．hit
C．beat
D．struck
