What do you think of teaching Bob?- I find it and challenging. It is a job you are

问题补充：

--- What do you think of teaching, Bob?

--- I find it and challenging. It is a job you are doing something serious but interesting.

A. funny, that

B. fun, that

C. fun, where

D. funny, which

答案：

A. funny, that

B. fun, that

(答案→)C. fun, where

D. funny, which

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