— Why _____ these cards ______ orange?

— Because orange can cheer you up.

A．do; colour

B．are; colour

C．are; colouring

D．are; coloured

治疗肠燥便秘，宜选用（）

A.柏子仁

B.酸枣仁

C.郁李仁

D.火麻仁

E.桃仁