Professor Li, who I ____ abroad, still teaches in Peking University.
#104877
A
think went
B
think to have gone
C
thought went
D
thought had gone
推荐题目
—The window is dirty.—I know. It ______ for weeks.
#102943
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
I want to change my desk. It _______too much room.
#103672
A
took up
B
has been taken up
C
takes up
D
is taken up
 By the time he was twelve he ______ a chemistry lab of his own.
#104127
A
built
B
has built
C
had built
D
was building