Question

In the office I never seem to have time until 5∶30 p.m．many people have gone ho

In the office I never seem to have time until 5∶30 p.m．many people have gone home．
A. whose time
B. that
C. on which
D. by which time

Answer 1

答案D
先行词5∶30 p.m．与time之间是一种同位关系，可用which来作定语替代；完成时态常与by连用，故选D。