11.   It was an outfit that I had bought on impulse, and never worn.

12.   Jack tipped him five and got behind the wheel of his Lincoln, which he was buying on time.

13.   Not all postcards are bought on impulse.

14.   People often buy on impulse while they are queueing to pay.

15.   Resist the temptation to buy on impulse, just because an outfit catches the eye.

16.   The reader who has bought your book has bought it on the understanding that this is what will happen.

17.   There is also the question of whether to buy on credit or to pay cash.

18.   Until then, availability of super-computers was limited to military researchers and others who could afford to buy time on them.

19.   Most new cars are bought on credit.

20.   You can ask a dealer for a discount whether you pay cash or buy on credit.