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
_____umbrella