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Complete the sentences using must or can`t with a suitable verb below to express a strong conviction that something is or is not true.
get up,be,have
1.(The phone rings.)That must be David.He said he`d phone for a date
2.(The phone rings.)That               Laura.She`s on holiday.
3.He`s got three cars and two houses.He           a lot of money.
4.He lives in one room and only eats once a day.He           a lot of money.
5.They speak German to each other at home.They            German or Austrian.
6.He starts work at five o`clock in the morning so he             early.
7.He starts work at five o`clock in the morning so he             late.