问题
Where ____ the recorder? I can’t see it anywhere.— I ____ it right hereBut now it’s gone.[ ]
A:did you put; have set up
B: have you put; put
C: had you put; was putting
D: were you putting; have put
B: have you put; put
C: had you put; was putting
D: were you putting; have put
正确答案是：
