Combine the subject (1-9) with the notion (a-i). 1 maths a animals 2 physics b gymnastics 3 history c 25y + 32 x = 51z 4 geography d c = mc2 5 physical education c h2o 6 english f the countries of the world 7 chemistry g the 15th century 8 biology h computers 9 information technology i spelling exercise 2. (10 points) fill the gaps with a or an. house aunt bear rabbit uncle daughter airport hour river

1 maths c 25y + 32 x = 51z
2 physics d c = mc2
3 history g the 15th century
4 geography f the countries of the world
5 physical education b gymnastics
6 English i spelling
7 chemistry c h2o
8 biology a animals
9 information technology h computers
a house
an aunt
a bear
a rabbit
an uncle
a daughter
an airport
an hour
a river
an umbrella