We have to put off the sports meeting _____ the rain. [ ]

You look unhappy， my son?—I’m wondering how long it’ll be we come to China again.

The water in this river is harmful because It’s a ______ river.

Did you have a good time at your party?―Yeah, and my mom cooked _________ for my friends.

So excited ____ when he received the invitation to the party that he ____ say a word. [ ]