You _______ play on the street.[ ]
A. can't
B. don't
C. not
D. can
答案：A
下列关于采用预制安装法施工桥梁承载结构，叙述正确的有（）。
A．构件质量好，尺寸精度高
B．桥梁整体性好，但施工费用高
C．不便于上下平行作业，相对安装工期长
D．减少或避免了混凝土的徐变变形
E．设备相互影响大，劳动力利用率低
During his life time, Edison ______ 1093 inventions.[ ]
A. worked
B. made
C. did
D. gave
