There are five circles with different colours on the flag of Olympic Games. They are green, blue, red        and       . 
#27890
A
yellow, black
B
yellow, purple
C
black, pink
D
pink, grey
推荐题目
How many________ do you need to finish this article?
#29314
A
paper
B
papers
C
piece of papers
D
pieces of paper
Do they like _______?
#29342
A
vegetable
B
tomato
C
broccoli
D
Hamburger
I don’t think looking after children is just    work.
#29749
A
woman
B
woman’s
C
women
D
women’s