----Have you known Professor Jackson in our department for a long time ? ----Yes, since he _____ the our university.
#4607
A
has come
B
comes
C
had come
D
came
推荐题目
.Every year in April, the Water Festival ______ among the Dai people in Xishuangbanna.
#4782
A
celebrates
B
is celebrating
C
is celebrated
D
is being celebrated
  _____ , you need to give all you have and try your best. 
#4941
A
Being a winner
B
To buy a winner
C
Be a winner
D
Having been a winner