___ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.
Our English teacher is . He always kept us in class.
Listen! Some person calling for you at the gate.
These wild flowers are so special that I would do _______ I can to save them.
It is the fact ______ Jane doesn’t know Jolin is a popular singer _______ surprises us all.
He is so humorous that he had us all through the meal.