THE TEACHER WAS EXPLAINING THE LESSON AND DID NOT NOTICE PETER ____...

9. - 20 DE TRAC NGHIEM TIENG ANH LOP 10 BAN CO BAN
20 DE TRAC NGHIEM TIENG ANH LOP 10 BAN CO BAN
9. The teacher was explaining the lesson and did not notice Peter _______ out.a. go b. went c. gone d. to go