Security cameras have been _________ in the city center.
举一反三
- The tighter measures include video cameras in the city center. A: security B: secret C: section D: secretary
- The tighter _________ measures include video cameras in the city center.
- Which city has been the administrative center of China?
- There have been calls for a new kind of security _____________(arrange).
- ____visiting that city, but we have been too busy.