4 Complete the texts with the correct forms of the verbs in brackets. (SPECULATING) Mike looks very happy. He can't have heard (hear) the bad news. A: I'm reporting from the edge of the Australian outback where forest fires are still spreading. It is expected that the fires may 1 (move) closer to nearby farms over the next few hours and people might 2 (have to) leave their homes. There has been no rain here for months and it is thought that most of the fires must 3 (start) as a result of the very dry conditions. However, some people think that tourists could 4 (cause) some of the fires by accident while camping in the area.