Every time_____ they met, they would talk several hours together about all of the  situations_____ appear

in the working world.      [ ]

A. that; when      

B. when; where    

C.which;what      

D. /; that

具有强心作用的消食药为

A．莱菔子

B．神曲

C．山楂

D．麦芽

E．麦冬