Choose the words and replace. not to meet, to take, to improve, come, not to understand switzerland.i come to london six months ago to learn english. english people yet, only my teachers. i started learning english at school in switzerland when i was eleven. at first in london, , but now my exam.
2)haven't met
3)didn't understand /hadn't been understanding
4)is impoving/has improved
5)l'm taking (запланированное действие)