Luna's grandparents have a sock store. The store has many socks in different colors like yellow, white and black. Luna likes red socks, because red is her favorite color.
A pair of socks is two dollars. And two pairs are only three dollars. The store has 200 pairs of socks on Monday morning. Luna's grandparents sell out all the socks on Friday. They record (记录) how many socks they sell every day. Here are the numbers.
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（1）
What is Luna's favorite color?
A . Yellow.
B . Red.
C . Black.
D . White.
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（2）
Four pairs of socks are____.
A . $2
B . $3
C . $6
D . $8
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（3）
How many pairs of socks do they sell on Tuesday?
A . 15
B . 30.
C . 40.
D . 50.
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（4）
When do they sell the most(最多的)socks?
A . On Tuesday.
B . On Wednesday.
C . On Thursday.
D . On Friday.
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（5）
How many days does it take to sell out all the socks?
A . Two days.
B . Three days.
C . Four days.
D . Five days.
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