接触粉尘作业，呼吸防护用品选择最常见错误是选用（）.
A、纱布口罩
B、防尘口罩
C、防毒面具
参考答案：A
---Let’s go to see the lions first?
---On, no! I think they are _______ ugly and scary.
A. too many B. too much C much too D kind of
Only with the greatest of luck _ to escape from the rising flood waters.
A．managed she
B．she managed
C．did she manage
D．she did manage
