-- If only I _______ the teachers instructions, in which case I ______ not so unlucky now.

-- It’s high time that you _______ yourself.

A．followed; am; should reflect

B．had followed; would have been; reflected

C．would follow; would be; reflect

D．had followed; would be; reflected

先天性肥厚性幽门狭窄呕吐开始最常见的时间为

A．生后2～3个月

B．生后1个月

C．生后3～4周

D．生后1周

E．生后1～2天