【题目】In the office I never seem to have time until after 5:30 p.m., many people have gone home.
A.whose timeB.that
C.on whichD.by which time
在线课程【答案】D
【解析】
考查定语从句关系词。句意:在办公室里我似乎直到下午五点半才有空,到那时许多人都已经回家了。这时一个非限定性定语从句,只有D选项by which time 相当于and by that time,表示“到那时”,故选D。