III.
smoke -> smoked
because -> so
is -> are
would she -> will she
fluent -> as fluent
IV.
34. that they're living in London with their parents now.
35. the weather was cold, they decided to go for a picnic.
36. who live next door to us are very naughty.
37. building has built by the workers for 4 months.
38. understand the grammar structure.
16B smoke => smoked
17B because => so
18A is => are
19B would she => will she
20C fluent => as fluent
34. The children said they were living in London with their parents then.
35. Although the weather was cold, they decided to go for a picnic.
36. The boys who live next door to us are very naughty.
37. This building has been built for 4 months by the workers.
38. I am not aware of the grammar structure.