Bonjour !
a)how many children are they?They’re Mr Smith’s children.
b)how often do you go to London?I go to London every summer.
c)why didn’t you tell me?I didn’t tell you because you were not there!
d)how far is it from there?Twenty miles,maybe a little more.
e)how did it happen?
f)wich one do you want?I would like the green one,please?
g)how hight is building?One hundred and sixty-three meters.