There have been ten thousand visitors to the exhibition since______.
举一反三
- Ten thousand dollars ___ a large sum. A: is B: have been C: are
- It has been ten years since I came to China.
- Two thousand dollars ______ (have) been used up.
- He said that it was at least ten years since I a good drink. A: had enjoyed B: was enjoying C: have enjoyed D: have been enjoying E: enjoys F: enjoyed
- Next week they（）in the factory for ten years. A: will be B: will have been C: are D: have been