关于高一定语从句的一道单选题2.Knowing how long the test would last,the students who finished ______ back and waited until the end of the exam.A.settleB.settledC.settlingD.to settle

关于高一定语从句的一道单选题2.Knowing how long the test would last,the students who finished ______ back and waited until the end of the exam.A.settleB.settledC.settlingD.to settle
关于高一定语从句的一道单选题
2.Knowing how long the test would last,the students who finished ______ back and waited until the end of the exam.
A.settleB.settledC.settlingD.to settle

关于高一定语从句的一道单选题2.Knowing how long the test would last,the students who finished ______ back and waited until the end of the exam.A.settleB.settledC.settlingD.to settle
你要从句意来理解,学生们知道测验有多长时间,如果是学生完成了settle back（靠在椅背上/仰坐）这个动作然后开始等到考试结束就不通了,应该是完成了测验的学生仰坐着并等到考试结束.
所以who后面finished加上______是定语从句修饰学生的,但我总觉得finished后面应该加个it代词,少成分,不过如果加上这题就没陷阱了.

D ,,,

B。但这道题的考点不在定语从句连接词的选择上，考的是谓语和非谓语。