Waves of red light are about twice as long as _______ of blue light.
#14848
A
those
B
that
C
it
D
Ones
推荐题目
 Is there           in this story.
#56646
A
wonderful something
B
something wonderful
C
wonderful anything
D
anything wonderful
Some people would rather ride bicycles as bicycle riding has _____ of the trouble of taking buses.
#15393
A
neither    
B
nothing    
C
some   
D
none