---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunch.

I think that's unlikely to happen, but if that ______ occur, both America's and China's interest would be severely damaged.

The weather in Liupanshui is ________ too cold _______ too hot.

I was really busy these days, otherwise I _______ to your birthday party last night.

--- Are you coming to Jeff’s party? --- I’m not sure. I _______ go to the concert instead