To keep slim, many young girls prefer going on a ______.
27. We haven’t settled the question of ____ it is necessary for him to study abroad.
26. --- I don’t suppose the police know who did it. --- Well, surprisingly they do. A man has been arrested and ____ now.
25. Sara said that she had to finish the experiment_____ week.
24. He saw a notice at the entrance ____ , “No spitting”
23. --- Where ____ the recorder? I can’t see it anywhere.--- I ____ it right here. But now it’s gone.did you put; have set up B. have you put; putC. had you put; was putting D. were you putting; have put