【题目】Which book is the most expensive?
A. The blue one. B. The green one. C. The red one.
在线课程【答案】C
【解析】
此题为听力题，解析略。
M: This book with a green cover is 20 dollars and the one with a blue cover is 15 dollars more. And the red one is twice as expensive as this one.
W: I like the one with the blue cover. But I can’t afford it right now. Sorry.