选择：The(clerk)(shop assistant)who served me was very helpful.
I(hanged)(hung)my coat in the hall.
Capital punishment has been abolished.Murderers will not be (hung)(hanged)in future.
I couldn't go shopping yesterday afternoon.I_____(go) to the dentist.
I really _____(buy) a new car but I can't afford to.
I didn't know you would be late.You _____(telephone).
注：用should，ought to或have to的正确形式填空。