单项选择题
A.at the bottom B.in the middle C.at the top D.below the green light
A.she drives the car more carefully B.she sees the road more clearly C.she can put on the brakes more quickly D.she has less chance of being color blind
A.he can see the difference between red and deep red B.he can see the difference between blue and green C.he can't tell the difference between orange and green D.he thinks green is the same as blue