1) The ability to use a language can be ______ only by the act of using the language.2) Your support is ______ to the success of this project.3) During the holidays the school often created a ______ , homelike atmosphere for foreign students.4) It’s hard for a teacher to ______ with each of students during the limited amount of teaching time.5) He was a great and honest artist ______ to express a world and a life he loved.6) It took him a while to ______ himself to his new surroundings.7) Lucy found it difficult to ______ any difference between these coins.8) After a(n) _______ journey, travelers finally reached the destination, exhausted.9) After reaching the top of her career, the actress now ______ herself to children’s charity work.10) She is subject to frequent ______ from high spirits to depression.