Put in a or an. 1.she is.. architect 2. do you want.. potato? 3/can you lend me computer disc? 4, he is .. american 5.i borrowed interesting book from the library 6 , i have got,, idea! 7. why should university be so prestigions? 8. what .. pity! 9. it insect 10, he is conservative 11. it picasso painting 12. it s sonnet 13. there is.. sandwich on the plate 14. it wont take you .. hour and.. half 15, he is such ,, intelligent man 16. what beautiful woman 17, it young animal 18. drink this medicine two times hour