问题详情

Which of the following italicized parts does NOT serve as an appositive？

A．Most students in our class, particularly David and Chris, are fond of Music.

B．He always spoke so — slowly but energetically.

C．The question whether to confess it or not troubled him.

D．There is nothing to fear.

请帮忙给出正确答案和分析，谢谢！