----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
----- The opening ceremony has already started.------Look! The flag is _______ now.
#103241
A
risen
B
raising
C
being raised
D
being rose
For the sake of enough time for study and rest, students are _____ from using cellphones in our school.
#99311
A
encourged
B
forbidden
C
required
D
kept
In this experiment, they are woken up several times during the night, and asked to report what they＿＿＿＿.
#104670
A
had just been dreaming
B
are just dreaming
C
have just been dreaming
D
had just dreamt
.You’ll never guess who I met today—my old teacher! We_____for twenty years.
#99994
A
don’t meet
B
haven’t met
C
hadn’t met
D
couldn’t meet
—Call me at 5: 30 tomorrow morning． —Why that early? I _____ then．
#103153
A
will sleep
B
was sleeping
C
will be sleeping
D
have been sleeping