Mum,you really need to have a rest!You ________in the kitchen ever since you came back home three hours ago.
#99412
A
had worked
B
were working
C
have been working
D
worked
推荐题目
After school we went to the reading-room to do some reading, only to be told that it ____________.
#101081
A
was decorated
B
had decorated
C
had been decorating
D
was being decorated
—Which flight ________ ? —I want to catch the 13:00. 
#104768
A
you are to catch
B
are you catching
C
do you catch
D
have you caught
Getting to the cinema, quite out of breath, we found the film     for ten minutes. 
#102720
A
having been on
B
had begun
C
had been on
D
had been started