1 how long did it take you to go to ha noi by taxi yesterday
>>> How long did you ............................
2 it will taker her two hours to finish this work
>>> she will spend ................................................
3 how long have they learnt english ?
>>> when ....................................................
4 he often played marbles when he was a child
>>>he used .......................................
5 we haven't visited him for three months
>>> the last ................................................