万能保险追加保费是指投保人缴付的（）之外的保费。
A、基本保费
B、附加保费
C、期缴保费
D、首期保费
参考答案：C
We drove a long way to see him, only________that he had just left for the south.[ ]
A. finding
B. found
C. having found
D. to find
白果中含有（）等有毒物质，食用时应注意。
A、皂素
B、龙葵素
C、氰苷
D、秋水仙素
ft for the south.[ ]