By the time she’s twenty , she __ almost everywhere in the world!

A．will be

B．would have been

C．will have been

D．would be

受弯构件减小受力裂缝宽度最有效的措施之一是（）。

A．增加钢筋直径

B．增加截面尺寸

C．提高混凝土的强度等级

D．增加受拉钢筋截面面积，减小裂缝截面的钢筋应力