單項(xiàng)選擇題He put forward a theory,（）of great importance to the progress of science of technology

A.I think which is  
B.which I think is 
C.which is I think   
D.I think it is


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1.單項(xiàng)選擇題He looked quite healthy though he was（）

A.in seventy  
B.in his seventies
C.at seventies  
D.age of seventy

2.單項(xiàng)選擇題He likes to swim（）

A.and to play football
B.and playing football  
C.but play football  
D.and he also likes playing football 

3.單項(xiàng)選擇題He is not a child（）

A.no more 
B.no longer 
C.any much 
D.any more

4.單項(xiàng)選擇題He is interested（）football, but not good at it.

A.at
B.in 
C.on 
D.of

5.單項(xiàng)選擇題He is an old friend of（）

A.my
B.mine 
C.me 
D.myself