Without the air to hold some of the sun's heat, the earth would be______on at night.
A. very cold for us to live
B. so cold to us living
C. too cold for us to live
D. rather cold of us live
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Which of the following is NOT needed for a young man to be happy？
A. Hard work
Being free from trouble
C. Wealth
D. Health
A．streetsB．crowdsC．passengersD．city
A. streets
B. crowds
C. passengers
D. city
You can stay here ______you keep quiet.
A. as long as
B. unless
C. in case
D. in order
对水泥稳定类基层，土的液限不宜超过()。
A. 0.2
B. 0.25
C. 0.3
D. 0.35
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