6 Fill in the gaps with the correct verbs: may,
might, could, should.
1 He ... be Australian, I'm not sure.
2 She ... be Ann's sister. They look quite similar
3 It ... be his book. I'm not sure.
4 He ... like football. I can't remember.
5 It's 7.30. We ... be a little late.
6 It ... get very hot in August.