单项选择题

The writer suggests that ______.

A．breathing smoke is net good for one's health
B．smoke will enter the room by an open window
C．it is difficult for fresh air to reach the second floor
D．it is better to keep your head low when there is smoke in the room

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热门试题

单项选择题

According to the passage, a window is ______.

A．the only way of escaping a fire
B．the best place if you want to get out
C．one of the possible ways to escape a fire
D．safer than any other ways of escaping a fire

单项选择题

Which of the following should not be used when trying to escape a fire

A．windows.
B．elevators.
C．fire escapes.
D．stairways.