The teaching building has five floors. My classroom is ________ the third floor. [ ]

Did you enjoy ___________ at the party last night, Lingling? –Yes, I really enjoyed the food and the music there. Thank you.

You can’t _____ jeans to the party.If you do so, the teacher won’t let you ___.

It’s _____ rather cold. I shall put my coat on.

Could you tell me_____ yuanxiao in china?— Usually at Lantern Festival.