PEP English 三年级下册,Unit 3 At the zoo,Part B Lets learn& Lets do,bi,g,small,lon,g,tail,short,Big , big , big! Make your eyes big ! Small , small , small ! Make your eyes small ! Long , long , long! Make your arms long! Short , short , short ! Make your arms short !,LETS DO,Performing these words with action after school,Homework,GOODBYE,