— Sorry, I can't work out this problem.

— Try again, please. It's only             difficult. [ ]

A. a bit

B. a lot

C. very

D. much

制式合同文本规定的内容不能覆盖借贷双方约定的全部事项时，应在（）中增加相应条款

A、口头

B、双方约定的其他事项

C、在另一合同

D、附属协议