The best way to explore _______ countryside is on _______foot.
Well, I really don’t know what you mean, ______ you want me to do?
Thank you for your hard work last week. I don’t think we _______ it without you.
Suddenly a good idea occurred to her, but she couldn’t find any paper ______.
Thailand has decided to begin building its first standard-gauge railways in cooperation with China, ______may cost $12.2 billion.
— Excuse me, can you show me the way to the nearest bus stop?— Sorry. I’m a stranger here. I ______ here until my guide arrives.