单项选择题

The word "Motel" comes from "motor + hotel". This is an example of （） in morphology.

A. backformation
B. conversion
C. blending
D. acronym

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单项选择题
Owen wouldn't eat anything （） he cooked it himself.

A. until
B. since
C. unless
D. while
单项选择题
— Sorry, I have to （） now. It's time for class. — OK, I'll call back later.

A. hang up
B. break up
C. give up
D. hold up
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