题目内容
（请给出正确答案）
______the atmosphere around our Earth, we would not be able to live.
A．Had it not been for
B．Would it not be for
C．If it has not been for
D．If it were not for
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A.disputed
B.discarded
C.dismissed
D.distorted
A.burned; disappeared
B.burned; disappearing
C.burning; disappearing
D.burning; disappeared
Those who celebrate Halloween without knowing its origins may______.
A．not understand Halloween" s true meaning
B．act as strangely as the dead and the devils
C．ruin the atmosphere of the celebrations
D．change their religious beliefs
There could be life on the Mars in the future if_____.
A．it supported life in the past
B．certain gases are used to cool the planet
C．the atmosphere can be heated enough to grow simple plants
D．the planet's volcanoes become as active as they were in the past
The author doesn't like eating in the cafeteria because ______.
A．he doesn't want to see his father during lunchtime
B．he wants to get out of the enclosed(被圈住的) atmosphere of the school
C．his mother tells him not to eat there
D．he doesn't like the idea of eating with his friends
