We got lost in the forest and decided to remain _____ we were and waited for rescue.
The workers and technicians worked hard _____ to get the Great Hall finished before National Day.
She turned ______ the pages quickly _____ a practiced hand.
The roads are lined _____trees, which have been planted to hold _____the strong winds from the north.
He earned enough money to start his own business _____ offering guide services _____ tourists.
_____ the night, we did nothing but _____ there, waiting for him to come.