I believe ________ you have tried your best and ________ you can come to the top of the class.

A．that；/

B．/; /

C．/; that

D．how; that

做纤维胃镜术时，病人宜取

A．左侧卧位头稍后仰
B．右侧卧位头稍后仰
C．颈后仰卧位
D．头低脚高位
E．头高脚低位