__________ that they had made an important discovery in science.
A. Little they realized
B. They had realized little
C. Little did they realize
D. Little had they realized
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__________ have I seen a better performance.
A. Everywhere
B. Nowhere else
C. Everywhere else
D. Nowhere
_________the plane.
A. Flew down
B. Down flew
C. Down was flying
Down fly
Hardly__________when the bus suddenly pulled away.
A. they had got to the bus stop
B. they got to the bus stop
C. did they get to the bus stop
D. had they got to the bus stop
完全竞争与垄断竞争市场的根本区别在于( )
A. 厂商数目的多少
B. 进入市场是否有障碍
C. 产品是否有差别
D. 市场信息是否畅通
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