He’s not a perfect child. He sometimes talks back (回嘴；顶嘴)       his parents talk with him.

We can easily become unhappy       we work out our problems in our daily life.

Your uncle will come to see you as soon as he        here.

—Alan! Why are you so late?
—Sorry! When I         home, I met one of my old friends.

Mr. Liu has taught English        he came here.

I told him the news          he came back yesterday.

Usually, we don’t know how important something is        we lose it.

Don’t forget to wash your hands        you have meals.

—Would you like to go for a walk with me, Alan?
—I’d love to,        you don’t want to go alone.

—I wonder whether Brazil will win the match later tonight.
—Go to bed first. I will wake you up as soon as the match        .