John was given the same suitcase his father and grandfather（）with them to school.

A. took

B. had taken

C. were taking

D. would take

对预制混凝土构件，说法正确的有（）

A.混凝土构件除另有规定外均按图示尺寸以实体积计算，扣除构件内钢筋、铁件所占体积

B.预制桩尖按虚体积，即以桩尖全长乘以平均的截面面积计算

C.大型屋面板之间的槽形嵌板，按大型屋面板项目计算。T形嵌板按檩条项目计算

D.预制构件的制作工程量，应按图纸计算的实体积（即安装工程量）另加相应安装项目中规定的损耗量