1 , smoked
2 , cheaper
3 , has lived
4 , sitting
5 , were playing
6 , are learning
7 , gave
8 , to tell
9 , has read
10 , come/asked
IV)
1- They didn't let me to go.
=>bỏ to
2- When John is four, he came to London with his parents.
=>was
3- How long have you living here ?
=>do
4- They are going to school by foot.
=>on
5- smoking =>smoke
6- than .=>as
7- haven't talked =>haven't been talked
8- much => more
9- keeping =>keep
10 different =>different from