單項(xiàng)選擇題The scientists are()a series of experiments to learn more about how the body adapts to weightlessness.

A.defining   
B.having   
C.carrying   
D.doing


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1.單項(xiàng)選擇題The red flower goes from one to()in the class.

A.the other  
B.others  
C.another  
D.other

2.單項(xiàng)選擇題The rain was()make our picnic impossible.

A.hard enough  
B.hard so to   
C.so hard as to  
D.so hard to

3.單項(xiàng)選擇題The radio is too noisy, please().

A.turn down it 
B.turn it down 
C.turn off it
D.turn it up

4.單項(xiàng)選擇題The public store is to close at 9:30 p.m. ()no need to worry; it is just 7:30 p.m.

A.You have 
B.They have 
C.It is 
D.There is

5.單項(xiàng)選擇題The population of the earth()increasing fast.

A.is
B.are
C.were
D.have been