单项选择题
A．the boat was on a dangerous voyage B．the boat was from an enemy country C．the boat looked like a ship from an unknown country D．it was the effect that the director wanted
A．by staring at them B．by applying electricity to the fish bowl C．by reducing the amount of electricity applied to the fish bowl D．by ordering them to stop
A．special effects often cost a lot B．actors destroy many things C．many actors are harmed or killed in film making D．special-effects people earn high salaries