单选题You’d better choose someo

问题补充：

单选题You’dbetterchoosesomeone______youthink____kindandfriendlytohelpyou.A.whom; to beB.who; isC.that; isD.which; to be

答案：

B解析you think是插入成份。定语从句缺作主语的人及be动词。