—Jane, have you finished yourpaper?     —No, I      my sister with her homework all the morning.
#102934
A
help
B
have been helping
C
helped
D
was helping
推荐题目
Unfortunately, when I arrived, Mary         , so we only had time for a few words.
#103471
A
was just leaving
B
just left
C
has just left
D
had just left
Kathy told me that all the doors and windows _______ when she arrived this morning.
#101604
A
have cleaned
B
have been cleaned
C
had cleaned
D
had been cleaned
Mr. Wang ____ two boys to send the sick boy to the nearest hospital
#101645
A
arranged
B
has arranged
C
had arranged for
D
has arranged for
George has arrived, but I did not know he ______ until yesterday.
#103817
A
comes
B
will come
C
is coming
D
was coming