All ______ is needed is a supply of oil.
Linda didn't find ____ she liked and went home with empty hands finally.
Every time the train goes ____ the village, all the houses will shake.
The leaders from all over the world met and discussed the importance of working together in APEC-China 2014.
---Reading is the best way to pass time on the train.---______, I never go traveling without a book.
— It’s hard to believe ______the way out of the forest without the help of the local guide?