If        these two colors, being color-blinded can be diagnosed.
#82943
A
not distinguished
B
one can’t distinguish
C
not distinguishing
D
one not having distinguished
推荐题目
_______a rapid stream between the two hills.
#83750
A
There flowing
B
Flowed there
C
Flowing there
D
There flowed
Not until I shouted at the top of my voice ______ his head.
#81541
A
that he turned
B
he had turned
C
he didn’t turn
D
did he turn
 This is an illness that can result in total blindness if_______. 
#84607
A
to leave untreating
B
left untreated
C
leaving untreating
D
is left untreated
I received his mother’s telephone call at eleven.__that he was badly hurt in an accident yesterday. 
#83933
A
Then did I know
B
Only then I knew
C
Only then did I know
D
Only then knew I