The plan was that the two parties should first reach an agreement on the basic , the details to be worked out later.
A. standard
B. practice
C. habit
D. principle
网友回答
A. standard
B. practice
C. habit
(答案→)D. principle
解析：句意：计划是，首先，这两个党派应该达成一致的基本的准则，之后再研究细则。Standard标准 practice练习 habit习惯 principle准则，选D。