Looks fabulous. I've just a few minor suggestions. :D
2. Several
rows of flats were built to solve the housing problem.
==> But in America--going back to your previous post about "at"--'apartments were built' would be the norm. :wink:
4. A
flash of lightning lit the sky followed by
a loud
roar of thunder;
a large quantity of water began to fall. ==> The underlined portion sound odd.
5. Several
sheets of paper fluttered to the floor as a
gust of wind blew through
the window.
==> Typo.
the, not
he.
6. A
group of people gathered round the scene of the accident. There was a
stain of blood on the road beside the overturned car.
==> I'd use around or 'round. :D
9. The
audience stood up as the
head of Ministers filed into the conference room.
==> Tdol'll catch this. I'm Canadian, and so, 'head of Ministers' sounds odd to me. We don't pay that much attention to politics. We trust too much. :D It's a British term, right?
All the best, :D