The best way to explore _______ countryside is on _______foot.
_____ holiday, my family will go to Shanghai to visit the World Expo.
Everyone in our school is working hard and doing what we can _____ a good college.
If _____, please buy me a backpack while you are at the supermarket.
Most of the countries in the world hold the belief _____ Taiwan is inalienable part of the People’s Republic of China.
. My mother was against my idea while my father was _____ it.