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．whom
答案
答案：A
考查名词性从句。句意：为了维持良好的关系，双方被建议集中在他们所有的共同之处上。focus on 后是一个宾语从句，have后缺少宾语，所以用what。