More than 100 students in that school_________ abroad for further study so far.
#99900
A
are sent
B
were sent
C
had been sent
D
have been sent
推荐题目
—Why does the lake smell terrible?—Because large quantities of water_______________.
#99629
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
Mike didn’t notice Alice entering his room. He ____ a phone call.
#104835
A
answered
B
has answered
C
was answering
D
is answering
 All the homework     , the students went to see the movie Black Hawk Down.
#103331
A
had been done
B
having been done
C
had done
D
having done