Which of the following sentences is right

_____ will you come back, Mum—In ten minutes.

study is hard work, we’d bettercontinue to the end.

We were ____ to go out for a camp ____ it began to rain

There is a chess match between a Korean player and AlphaGo(阿尔法).—It’s very amazing. Playing _____ chess is usually ________ one-to-one game.