腐蚀是一种物质由于与（）作用而引起的破坏或变质。
参考答案：环境
Don’t _____ the door. It’s cold outside.[ ]
A. open
B. to open
C. opening
-__________ you Mr. Zhang?
-Yes, my name __________ Zhang Ming.[ ]
A. Are, am
B. Is, are
C. Is, am
D. Are, is
