— Some cars are really expensive. — 单选题 (10 分) 10分 A. Certainly they are. They burn less gas. B. I do hope so. C. I don.t know about that.

— Some cars are really expensive.

—
单选题 (10 分) 10分
A.
Certainly they are. They burn less gas.

B.
I do hope so.

C.
I don.t know about that.

出自：国家开放大学-理工英语3

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