By the time he arrived at the airport, the plane            .
#41977
A
has taken off
B
was taking off
C
would take off
D
had taken off
推荐题目
How time flies ! Several years _____ since we last met at Jack’s Party.
#39388
A
has passed
B
had passed
C
have passed
D
will pass
I      my homework, I guess I can't join you.
#42122
A
don't finish
B
didn't finish
C
haven't finished
D
won't finish
---Is Lucy ______ her homework?--- No , she ________ .
#39513
A
do; doesn’t
B
does; isn’t
C
doing; is
D
doing; isn’t
We __________a great time at the party last night. 
#39300
A
have
B
has
C
had
D
are having