survey
- We did a survey _____ our readers. [ ]
- Mr Philip has made ______ survey on students’ lunchtime, and ______ survey shows us a lot of problems.
- The survey shows that 200 students do different things during their vacations. ______ of them take classes according to the survey.
- The survey shows that 200 students do different things during their vacations. ______ of them take classes according to the survey.