用适当的介词填空

People like swimming ________ summer because water makes people feel cool.

介词填空

I'll wait for you ________ the school gate tomorrow morning.

--Do you mind my opening the window? It's hot here.

--________.

[　　]

--________

--There is heavy rain.

[　　]

--What will you do next week?

--_________.

[　　]