A．essentialB．accidentalC．unnecessaryD．necessary
A. essential
B. accidental
C. unnecessary
D. necessary
According to the passage, man will begin to think about such needs as housing and clothing
A. he has saved up enough money
B. he has grown dissatisfied with his simple shelter
C. he has satisfied his hunger
D. he has learned to build houses
A．plantsB．treesC．rubberD．streets
A. plants
B. trees
C. rubber
D. streets
A．in factB．eventuallyC．practicallyD．as a matter
A. in fact
B. eventually
C. practically
D. as a matter
微信支付 
支付宝支付