I don’t smoke now, but I __for almost ten yearsIt is said that China has been a member of WTO since 11?December?2001.(本题2.0分) A、 ever smoked B、 have ever smoked C、 had ever smoked D、 was ever smoking

I don’t smoke now, but I __for almost ten yearsIt is said that China has been a member of WTO since 11?December?2001.(本题2.0分)
A、 ever smoked
B、 have ever smoked
C、 had ever smoked
D、 was ever smoking

出自：河南工业大学大学英语(二)

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