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
I'm expecting a pet dog for long，but mom has no time to buy _________ for me．
#57577
A
it
B
one
C
this
D
that
—In fact I don’t have a digital camera.—You should buy _______. Sony is a good brand.
#16213
A
this
B
that
C
one
D
it
________ that's important is that you are doing your best and moving in the right direction.
#14568
A
One
B
All
C
Everything
D
Anything