I used to climb the trees in my childhood.
I used to train my dog in my childhood(дрессировать собаку)
I used to eat jam from the jar in my childhood.
A/ ...........I have to
b/I had to wait
c/ has to wear ...........he hasn't
d/We don't have to wake up ............
e/ ..............they have to take it
f/ My sister has to study...........
g/.........you have to get.......
h/ ...........I have to care about........
i/ Nick has to take ........
k/ ..........I had to wear .......
I live in Troitsk.
Очень просто, удачи:)