He had no idea of how the climb would be _______ he was half way up the mountain.
. I don’t think ______ possible to master a foreign language without much memory work.
. The singer became famous in the early 1980s, ______ the classical music was better than pop music.
. ---How long have you _______? ---5 years.
. . --- Thanks for your help, but can you do me one more favor, please? --- ____, sir. What’s it then?
. . ________each other for long , the two brothers decided to meet soon.