--- What        it be?

--- It         be a man, for it is not moving. It      be a dustbin, I think.

A．can, may, must

B．can, can’t, must

C．can, must, can

D．may, may not, could

东风EQl090汽车节温器，当水温低于76℃时，节温器关闭缸盖出水口，开放由出水口至水泵的通道。