下列属于三原色光的是( )
A:黄光
B:紫光
C:绿光
D:白光
A. Let's go.
B. Are these your shoes?
C. Let's play football.
D. They are on your feet.
E. What are they?
A:It's warm today.____
B:Great!____
A:Where are my shoes?
B:____
A:No.they aren't.
A:Look!____
B:Oh.I'm sorry.