--When      your mother       you that computer?---Oh, I have forgotten.
#37379
A
does,buy
B
has, bought
C
has,had
D
did,buy
推荐题目
The film         for five minutes when she got there.
#42697
A
has begun
B
has been on
C
had begun
D
had been on
Tom often ______ TV in the evening. He’s _____ TV now.
#36565
A
watches; watching
B
watching; watches
C
watch; watching
D
watches; watches
Listen, a small number of students ______ in the classroom. 
#40135
A
talk
B
talks
C
is talking
D
are talking