A or An?

Complete the following sentences with A or AN

1 . - It is ____________________ lovely day .
2 . - It is ____________________ old university .
3 . - He is ____________________ unusual man .
4 . - It is ____________________ exception to the rule .
5 . - It is ____________________ long trip , but it is ____________________ easy trip .
6 . - It is ____________________ large library .
7 . - It is ____________________ ugly hotel .
8 . - It is ____________________ pear .
9 . - He is ____________________ honest man .
10 . - She is ____________________ happy child .
11 . - The car is ____________________ used car .
12 . - It is ____________________ tall tree .
13 . - It is ____________________ egg .
14 . - It is ____________________ apple .
15 . - It is ____________________ old bus .
16 . - It is ____________________ empty bottle .
17 . - It is ____________________ hour till lunch .
18 . - It is ____________________ windy day .
19 . - The gift is ____________________ new book .
20 . - It is ____________________ old building .