I Listen and number.
yellow
red

green
blue

2 ; 4 ; 1 ; 3

II Look, read and match.
1. It's green. It can say "Be careful!"
2. It's red. It can say "Go!"
3. It's blue. It says "No!"
4. It's yellow. It says "Use again!"

Ⅲ Read, choose and colour.
1. ______ ○ + red ○ = purple ○
2. blue ○ + ______ ○ = green ○
3. yellow ○ + red ○ = ______ ○
4. yellow ○ + red ○ + blue ○ = ______ ○
想一想,在圆圈里涂一涂,填上正确的答案。
A. blue B. yellow C. black D. orange

A
; 蓝 ; 红 ; 紫 ; 蓝 ; B
; 黄 ; 绿 ; 黄 ; 红 ; D
; 橙 ; 黄 ; 红 ; 蓝 ; C
; 黑