Put in at, on, in, for of no preposit
1Are you free _____ Friday evening?
2Con you come round to my place ______ nine o'clock tomorrow?
3It's my birhday ______ thvee days?
4We're going to colifornia. How long _____? Three weeks...
5We haven't got time to go shopping - the shops close ______ five minutes?
6What are you going _____ next Tuesday?
7Can I talk to you _______ five minutes?