1)
a) workers
b) students
c) teachers
d) technicians
e) plumbers
2)
a) in the morning
b) at noon
c) in the afternoon
d) in the evening
e) at night
3)
a) one hour
b) two hours
c) three hours
d) four hours
e) five hours
4)
a) rain
b) wind
c) animals
d) heat
e) bad smell
5)
a) a change in weather
b) a group of animals
c) a lost key
d) spilled water
e) rotten food
6)
a) to go to a party
b) to get some food
c) to get something to drink
d) to see their friends
e) to study for exams