In order to finish the research, the pro
题型:选择题
问题:
In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.
A.mixed up
B.cleaned up
C.turned up
D.stayed up
In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.
A.mixed up
B.cleaned up
C.turned up
D.stayed up