---Is there any _______ to the time about how long I can stay here?---Yes, you must leave here before he comes back.

The public ______ of the environmental problem will make the government take it seriously. 

She expressed ________to the teachers for helping her pass the College Entrance Examination.

American artist Jeremy Telford made a room with balloons． He got the____    from Bag End in Lord the Rings, which is a hole in the ground where a Hobbit（霍比特人）lives in the film．

—Where did you spend last weekend?—At______.