1.They.....be out. They aren'y answering the phone.(must,can't,might not)
2.Jack..... be on holiday. I have't got seen him for a week. (might not, can't, might)
3.They..... be rich-they've got three houses!
4. She...... be awake yet. It's only seven o'clock.
(might, might not, can't)
Należy wstawic jeden z wyrazów z nawiasu.