Stay awake! You should know that it ________ to sleep in class.
I’m no painter, and to me, one painting is much like .
Be tough-minded, but tender-hearted, ?
—Jack, how did it that you made so many mistakes in your homework? —I myself haven’t figured it out yet!
— .—OK. I sometimes have no sense of direction.
My mother hasn’t been to Beijing , my father .