Can/could/may/might, places in the city

Hello, ............I help you?

It's very cloudy today, it .........rain tonight

Excuse me, .........I come in?

......you give me that cake?

You may stay at a .........for tomorrow night.

My parents are going to have dinner at the new ..............

My sister arrived at the train.............five minutes late.

You can see a lot of paintings in a..........

My plane leaves from Zhuliany..........

Could you bring me a cup of tea,please?

Can we swim in the river?

May I see your passport, please?