Thousands of houses _______ by the floods in Guangxi last month.
---How do you study ____the final test?---I study ____ working with a group.
--I’m worried about my math exam.---______.I believe you can pass it.
A group of middle school students spent two weeks ____the jungle.
She doesn’t have a pen ____.
___ is said that _____ tourists visit this city every day.