Feathers are very light, we say "as light as a feather".
The information office is ________in the centre of the city.
Tibet lies ________the west of China while Japan lies ________the east of China.
--Hi, Jack! We’re going to have a walk along the beach this Sunday. --_______. I love sunshine.
________ the market in three months, the new product will make a big difference.
Mary _______ have arrived ten minutes earlier but her flight was held up because of the heavy fog.