---It is worrying that the children are playing by the river, isn’t it?---___________
I regret___you that you failed in the final exam
—Why haven’t you bought any butter? —I___to but I forgot about it
—Will you go to the bookstore tomorrow? —Sure I will,___it doesn’t
___,there is always something one wants
Busy as the man is,he___every weekend to staying with his wife and children