----This returned Chinese scholar has become one of the top experts in this field.----Yes,I know him very well.He____in Africa with animals for eight years.
#104192
A
has worke
B
had worked
C
worked
D
has been working
推荐题目
—Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here.
#101422
A
have been caught
B
have caught
C
had caught
D
was caught
- How could I thank you enough? - Don't mention it. Any other man_____that.
#100289
A
would do
B
will do
C
would have done
D
must have done
The plane ＿＿＿＿＿ at 7：00 p.m., so I have to be at the airport by 6：40 at the latest.
#104671
A
has left
B
is to leave
C
will have left
D
leaves
He will have learned English for eight years by the time he _______ from the university next year．
#99963
A
will graduate
B
will have graduated
C
graduates
D
is to graduate