They are ___ vacation in Sydney. [ ]
A. in
B. on
C. at
D. during
答案：B
We were very angry that there was little given to those who had worked the hardest
on the project. [ ]
A. credit
B. punishment
C. scold
D. blame
承重的满堂红脚手架，立杆的纵、横向间距不得大于( )，纵向水平杆(顺水杆)每步间距离不得大于( )。
A．1.3m，1.5mB．1.5m，1.4mC．2.0m，1.7mD．1.2m，1.6m
