保险公司次级债是保险公司为了弥补（）资本不足而发行的债券。

A.临时性

B.短期性

C.阶段性

D.长期性

—I promise that she _____ get a nice present on her birthday.  

—It will be a big surprise to her.   [ ]

A. must            

B. shall                

C. should                

D. would