_______ today, he would get there by Saturday. [ ]

A. If he leaves      

B. Was he leaving      

C. Would he leave

D. Were he to leave

设计书刊表面整饰加工方案，应注意的事项有（）等。

A.所选加工工艺与材料要相互匹配

B.儿童图书既要色彩鲜艳，又要耐磨耐脏

C.要与目标读者的购买能力相适应

D.尽量采用高档材料，以争取更好的经济效益

E.教科书尽量少用特种印刷工艺，以降低生产成本