Language focus 3 Complete the sentences with the words in
the box.
can
can't could couldn't
how many must should
1 You turn off mobile phones in exams.
It's one of the rules!
2 '_ you swim when you were four?'
'No, I _. I learned when I was six.'
3-languages — your parents speak?'
'Only English. They __speak any other
languages.'
4 'Have you got any advice?'
'Yes, you — tell your teacher.'​