—  Have you received any phone calls from your sister?

— Not yet, but we ______ to get in touch with her ever since she left us. [ ]

A. have tried

B. tried

C. are trying

D. have been trying

王品因犯故意杀人罪，可能需要使用附加刑，依照我国《刑法》的规定，附加刑应当如何适用( )

A．只能独立适用

B．只能附加于主刑适用

C．只有主刑是有期徒刑以上刑罚的，才可以附加适用

D．既可以附加适用，也可以独立适用