建筑材料供应的基本任务是以（）为中心。
A.工地
B.计划
C.施工生产
D.材料采购
参考答案：C
When he grows up, he's going to do _________.[ ]
A. what he wants to do
B. what does he want to do
C. what he want to do
D. what will he like
简述广告的心理战术
