By the time my mother came back from work, my sister and I ________ supper and were waiting for her at the table.
#101144
A
have cooked 
B
were cooking
C
had cooked
D
would cook
推荐题目
Do you know the thief_______by the police.
#101352
A
has been catching
B
has caught
C
has been caught
D
will caught
Where were you at lunch time? I   a seat for you in the dining hall.
#104548
A
saved.
B
was saving .
C
have saved.
D
had saved.