I. a - C
b - D
c - B
d - A
e - E
II.
1. an
2. Ko có
3. an
4. a-a
5. a
III.
1.This school is biger than that one.
2. Those clocks are small.
3. Your room in this house is big.
4. Thu's school is in the city.
5. Where is Lan's house?
IV,
1. not
do
are
There are
are there
There are
2. is big