.Opening the book, she found in it a white, plain envelope with her name ______ on it.

A．to print

B．printed

C．printing

D．print

A fire must be ventilated（）.

A.when using an indirect attack on the fire such as flooding with water

B.to prevent the gases of combustion from surrounding the firefighters

C.to minimize heat buildup in adjacent compartments

D.if compressed gas cylinders are stowed in the compartment on fire