I _____ to help you to do homework but I couldn’t spare any time. I _____ a composition last night and I’ll finish it today.

A．wanted; wrote

B．had wanted; was writing

C．have wanted; wrote

D．wanted; have been writing

BP004布管轴线应符合设计要求，而且相邻管口错开l00~（），以便清管和处理管口。

A.120mm

B.150mm

C.200mm

D.250mm