题目内容
( ) 4. ―What are you reading?
—A newspaper.It says some UFOs are only met______ .
A. by mistake B. by sudden
C. by chance D. by bus
4. C by chance意为"偶然地"；by mistake意为"错误地"，故选0。
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题目内容
( ) 4. ―What are you reading?
—A newspaper.It says some UFOs are only met______ .
A. by mistake B. by sudden
C. by chance D. by bus
4. C by chance意为"偶然地"；by mistake意为"错误地"，故选0。