—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
The flowers were so lovely that they       in no time.
#103157
A
sold out
B
had been sold out
C
were sold out
D
would sell out
 Since last year I____ him only once.
#103740
A
have seen
B
have been seeing
C
see
D
was seeing
I heard that he ________ for three days. Do you know if he is better now?
#100995
A
fell ill
B
had fallen ill
C
was ill
D
had been ill