根据管道涂色的一般规定要求，压缩空气管道应涂（）色。
A.浅蓝
B.深蓝
C.黄
D.灰
参考答案：B
They had not finished their homework in time, so they tried to avoid_____ by copying answers. [ ]
A. being punished
B. punishing
C. to punish
D. punished
甘薯粉
