A、$2,00. B、$3.00. C、$4.00. D、$1.00. C绿笔价格是黄笔的两倍:2×2=4。

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问题  
W: This pen is a dollar and the yellow one is $2.00.
M: The green one is twice as much as the yellow one.
Q: How much is the green one?

选项 A、$2,00.
B、$3.00.
C、$4.00.
D、$1.00.

答案C

解析 绿笔价格是黄笔的两倍:2×2=4。
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