a.experiment
b.interview
c.observation
d.registration
e.survey

7.how many from the ushers and you usherettes in the party are very welcoming and smiling while the guests are approaching the reception hall?
8.how fast does the culture crew serve the order red meal of the three consecutive customer?
9.is the stop light in the city helpful to all concerned?
10.what is the average grade of the grade 7 learners in mathematics school year 2019 to 2020?​