There is _______ wrong with this commputer. It doesn’t work well.

For years, it was viewed as a serious problem, ________ that has never been really solved.

—There is still a copy of the book in the library．Will you go and borrow _____?—No．I’d rather buy ______ in the bookstore．

Put it down, Richard. You mustn’t read ________ letters

---What should we do in order to reduce food waste? ---In a restaurant only order as _______ as we need and try to eat it up.