Poisonous vapors burst out of the factory

Scarcely had she heard the sad story when she burst out crying.

Scarcely______the sad story when she burst out crying.A．did she hearB．had she heardC．she h

His strong sense of humor was______make everyone in the room burst out laughing. （1998年考

She managed to scramble（爬)out of the vehicle as it burst into _____.A. flamesB. fuels

Sam set out to improve _____ at the shirt factory, but he failed at last.A.efficiency

Poisonous vaporsburst out of the factory d