A student (19) ______ English occasionally meets the following problems when he (20) _______ to talks and lectures. It is difficult to decide where one word finishes and the next one starts. In speech, many sounds (21) ______ a student difficulty and he fails to identify them. Some words in English, which occur very (22) ______, have a weak form. An overseas student identifies them with difficulty. In addition, many students sometimes do not hear the stressed (23) ______ in a word. This problem never arises in print. The lecturer who uses an informal style and who pronounces his vowels with a strong accent will be difficult to follow. A student can take (24) ______ more easily when the lecturer speaks with a BBC accent. 19. A. learning B. researching C. practicing D. saying 20. A. hears B. listens C. used D. sounded 21. A. make B. take C. give D. cause 22. A. common B. commonly C. uncommon D. commonness 23. A. sentence B. phrase C. syllable D. sound 24. A. writing B. letters C. message D. notes