问题
选择题
To maintain a nice relationship, both sides are advised to focus on _______ they have in common.
A．what
B．that
C．which
D．where
答案
A
题目分析：句意：为了维持一个良好的关系，双方被建议专注于共同的东西。介词on后面接的是宾语从句，宾语从句中缺少宾语，用what引导宾语从句，所以选A。