问题
选择题
You should study the details of the policy before you sign it.
A．in return
B．in advance
C．at ease
D．on purpose
答案
B
题目分析：A．in return做为回报，B．in advance提前，C．at ease轻松，D．on purpose目的，句意：在你签字前，你应该提前学习政策的细节。所以选B。