71
Unit 5
Activity 7c: This river was clean 15 years ago but it is now polluted.
Describe what people have done.
People _______________________ (to pollute) the river. They _______________________
(to throw) rubbish in the water. They ___________________ (to have) picnics on the
banks of the river and _____________________ (to leave) plastic bottles and cans on the
grass. They ___________________ (to wash) clothes and _________________ (to kill)
the sh and shrimps. The people _______________ also _______________ (to light) res
for a barbecue and ___________________________ (to burn) the grass. Really, they
__________________________ (to spoil) this beautiful place.