用压缩空气枪吹洗工件时，除了防尘口罩，还应佩戴哪个防护用品？（）
A、耳罩
B、护目镜
C、头盔
参考答案：B
I found the book I （）I （）in the teachers' room! What a happy afternoon!
A. think; have found
B. thought; had lost
C. saw ; put
D. thought ; had taken
