《生产性粉尘作业危害程度分级》不适用于( )及能引起化学中毒的危害性粉尘。
A．高温性粉尘
B．金属性粉尘
C．放射性粉尘
D．混合性粉尘
参考答案：C
学法、用法、护法是我们[ ]
A．应尽的责任
B．可尽的责任
C．成年以后要尽的责任
D．工作以后才需尽的责任
— What's wrong, Mary? You look sad.
— Oh, nothing much. In fact, I _____ of my English test. [ ]
A. think
B. was thinking
C. will thing
D. would think
