Scientists say it may be five or six years_______it is possible to test this medicine on human patients.

Good luck _____ you!—_____. [ ]

Tina had nothing for supper, ___ she?—___ . She had some bread and milk.

Mr. White spent about one hour and a half _________ the accident report yesterday evening.

What do you think of living______ in a big flat?—I think I will feel______. [ ]