I have often heard this song I have never heard you sing it.A. In caseB. ThoughC. EvenD.

问题补充：

I have often heard this song, I have never heard you sing it.

A. In case

B. Though

C. Even

D. In spite of

答案：

A. In case

(答案→)B. Though

C. Even

D. In spite of

解析：In case引导条件状语从句；In spite of是介词短语。Even是副词。