1) If / Provided that you book your flight early, you will get a seat. 2) If / Unless you meet Darren, give him my regards. 3) As long / If as you follow the instructions carefully, you won 't have any difficulties. 4) You can hire a car in France if / as long you have a driving licence and you 're over 23. 5) You can 't enter the country providing / unless you have a passport. 6) Supposing/Provided you forgot your wallet at home, what would you do? 7) Unless/As long as you train hard , you won 't be ready to run the marathon next month.

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