单选题He drove slowly on t

问题补充：

单选题Hedroveslowlyonthewayhomeuntilhereachedthehighway,_____thespeedlimitwas60milesperhour.A.becauseB.whichC.whereD.that

答案：

C解析先行词是highway表示地点，定语从句中不缺主语和标语，故用关系副词在从句中作地点状语。【标签】定语从句关系副词