完形填空。 People in many countries are learning English. Some learn at school, others study by 1 . A few learn English 2 the radio. Why do all these people want to learn English? It's difficult 3 that question. Many boys and girls learn English at school 4 it is one of their subjects. Some people learn English because it's useful for their work. Many students often learn English for their 5 studies because 6 the college, some of their books are 7 in English. It is not easy to learn a foreign language. But there is 8 difficult in the world if you 9 your heart into 10 . (     )1. A. himself (     )2. A. by (     )3. A. answer (     )4. A. why (     )5. A. lower (     )6. A. near (     )7. A. write (     )8. A. something (     )9.  A. keep (     )10. A. it B. oneself B. with B. to be answered B. where B. longer B. at B. wrote B. anything B. put B. them C. themselves C. on C. answered C. because C. short C. on C. written C. nothing C. take C. us D. ourselves D. in D. to answer D. how D. higher D. with D. is written D. some D. bring D. desk