5. b, yet
c, ever
d, for
e, never
f, since
g, ever
h, when
6. b, used to ride a bike
c, has gone
d, Tim and Sue used to play in the garden..
e, How long did you stay
f, Joe has been living here for three years
g, Have you ever been to Scotland
h, I have been here for 2 hours
7. b, did you have
c, what were you doing
d, I haven't done
e, I used to wear glasses
f, he missed the bus
g, Have you met before?
h, I used to get up