His father, a famous university professor, who is said to have started his teaching career in Australia, _____ in Nanjing University for more than twenty years.
#101514
A
has worked
B
worked
C
is working
D
will work
推荐题目
The manager was concerned to hear that two of his trusted workers ______. 
#102158
A
will leave
B
are leaving
C
have left
D
were leaving
---When ______ again?  ---When he ______, I’ll let you know.
#103420
A
he comes; comes
B
will he come; will come
C
he comes; will come
D
will he come; comes
.Despite UNICEF’s efforts, dirty water ______ for disease spreading in southern Iraq at the very moment.
#103783
A
is to be blamed
B
is being blamed
C
has been blamed
D
was blamed