I.
1, too expensive
2, cheap enough
3, too loud / loud enough
4, too hard
5, too small / big enough
6, too easy
7, too hot / hot enough

I.
1. cheap enough
2. too expensive
3. too loud/ loud enough
4. too hard
5. too small/ big enough
6. too easy
7. too hot/ hot enough
II.
1. held
2. will be celebrated
3. have already been invited
4. have been arranged
5. had already planned
6. just asks
7. to arrive
8. has been composed
9. is shown
10. is needed

III.
1, English is spoken in Australia.
2, The Pyramids were built by ancient Egyptiens.
3, Cars weren't invented in the sixteenth century.
4, The vase was repaired yesterday.
5, The table and chairs have just beeb moved.
6, My sister is the tallest in her class.

III.
1. English is spoken in Australia
2. The pyramids are built by ancient Egyptians
3. Cars are not invented in the sixteenth century
4. The vase is repaired yesterday
5. The table and chairs have just been moved
6. My sister is the tallest in her class
7. You are being asked questions later
8. He will be not invited next time
9. My dad drives faster than my mom does

IV.
1, isn't he
2, wasn't I
3, can you
4, didn't he
5, was she
6, could he
7, do we
8, aren't you
9, couldn't they
10, don't we

V.
1, was opened
2, big
3, something
4, are going to visit
5, want
VI.
1, What is your family name?
2, How do their father go to work?
3, Is your old school much bigger than this one?
4, How far is it from the house to the nearest bus stop.