The twins, Who       their homework, were allowed to play badminton on the playground.

A．will finish

B．finish

C．have finished

D．had finished

附着框架应尽可能设置在（）

A.塔身2个标准节之间

B.起重臂与塔身的连接处

C.塔身标准节的节点连接处

D.平衡臂与塔身的连接处