Activity 3. Complete the sentences with "must", "don't" or "can't". Use the words in
the box.
protect
throw
keep
sleep
1. We must protect_
the earth.
2. You must throw_
garbage in the bin.
3. The soup is yummy.
You
4.
school.
it!
at
fight
try
wash
take
5. You
the class.
6.
here.
7. You
quiet in the library.
in
photos
8. You
your hand before you eat.