140. While I was in the university, I learned taking a photo, ________ is very useful now for me. 我在大学里学会了照相，现在对我很有用。 A. it B. which C. that D. what

140. While I was in the university, I learned taking a photo, ________ is very useful now for me.
我在大学里学会了照相，现在对我很有用。
A. it B. which C. that D. what

出自：东华大学大学英语4

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