He always walks sideways so   3       not to inconvenience anyone. Instead of saying “Excuse me”, he prefers to glide by one side.   4        the gap is so narrow that it will not allow him to pass, Luke waits patiently  5       the obstruction (障碍物) moves by itself. Stray dogs and cats panic him, and in order to avoid them, he constantly crosses from one side of the road to the   6      .

He speaks in   7       very thin, subtle voice, so inaudible that it is hard to tell if he is speaking at   8       . He has never interrupted anybody. On the other hand, he can never manage more than two words without   9      (interrupt). This does not seem to irritate him; in fact, he actually appears happy 10       (be) able to utter(发出) those two words.