Question

Choose the correct word: 17.can/should I ask you a question?18.will/shall we go out for lunch today?19.you must/shouldn't stay at home if you are all.20.tommy can't/couldn't tell the time when he was a baby.21.my book can't/mustn't be in the house.I've looked everything.22.you haven't/needn't clean the windows.I've already done them.23.sam left late for the airport this morning.He should/could have missed his flight​

Answer 1

17can

18will

19must

20can't

21can't

22needn't

23could have

Answer 2

17. Can I ask you a question?
18. Shall we go out for lunch today?
19. You shouldn't stay at home if you are ill.
20. Tommy couldn't tell the time when he was a baby.
21. My book can't be in the house. I've looked everywhere.
22. You needn't clean the windows. I've already done them.
23. Sam could have missed his flight (if he left late for the airport this morning).