David has a stomachache. _____ . 

A．He shouldn’t go to the hospital.

B．He shouldn’t eat anything for 24 hours

C．He shouldn’t drink hot water

D．He shouldn’t have a rest

设s="Visual Basic Programming"，则以下使变量x的值为“Basic”的语句是

A．x=Left(s，6)

B．x=Mid(s，6)

C．x=Right(s，6)

D．x=Mid(s，8，6)