) At a later stage, some new problems _______, which seemed more difficult to deal with. ( )(本题2.5分) A、 rose B、 raised C、 arose D、 arisen

) At a later stage, some new problems _______, which seemed more difficult to deal with. ( )(本题2.5分)

A、 rose
B、 raised
C、 arose
D、 arisen

出自：西安石油大学-石油工程技术-大学英语l(下）

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