a)The letters are delivered at 8.00
b) This hotel was built two years ago.
c) A lot of preservatives in food are used these days.
d) Has your question been answered?
e) Your keys were found on top of the photocopier.
f) Reference books shouldn`t be taken out of the library.
g) The rate of taxation has been increased to forty per cent.
h) Penicillin was discovered in 1928.