The fire spread through the hotel very quickly but everyone_____get out.

A．had to

B．would

C．could

D．was able to

预应力钢束及粗钢筋在使用前必须作张拉、锚固试验，应进行（）、喇叭，摩阻等预应力瞬时损失测试，以保证预施工应力准确。