I think 100 years from today there will be flying cars which people will park __27__ the
buildings. If this happens, there won’t be any more traffic jams! Tourism in space will be very
popular, and space shuttles will take people _28_ exciting vacations to the Moon. I believe that
most houses will be environmentally friendly as we’ll only use alternative sources of energy
__29__ wind and solar power. In the future, I think robots will __30__ most of our housework, so
life will be easier.
【題組】27. (A) at the bottom of (B) in relation to (C) on top of (D) with reference to