Ithasbeenyears________Ireturnedhome.
A、after
B、that
C、since
D、when
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
A、behind
B、alone
C、out
D、aside
Ittookafewsecondsforhereyesto________tothedarkness.
A、allocate
B、adopt
C、apply
D、adjust
Thereisanambiguityinthesentence“Heisahardbusinessman”dueto______.
A、polysemy
B、homonymy
C、synonymy
D、antonymy
Iwaswritingareportlastnight;________Iwouldnothavestayeduplate.
A、however
B、otherwise
C、therefore
D、furthermore