Read the following passage and choose the best option for each numbered blank.

Every year, students in many countries learn English. Some of these students are young children. Others are teenagers. Many (1) ______ adults. Some learn at school, others study (2) ______ themselves. A few learn English just by hearing the language in films, on television, in the office or among their friends. But not many are (3) ______ enough to do that. Most people must work hard to learn another language. 

Others are teenagers. Many (1) ______ adults.ge.