正确答案：All the research assistants of this lab must work 7 days a week from 10 a. m. to 12 p. m. They should work at full stretch during their office hours. Alltheresearchassistantsofthislabmustwork7daysaweek,from10a.m.to12p.m.Theyshouldworkatfullstretchduringtheirofficehours.
