a) If you are tired , sit down .
b) If the headmaster comes in , stand up .
c) If you are too hot , open the window .
d) If you want to get good marks , learn your lessons .
e) If you don't know how to write a word , check in a dictionary .
f) If you want to check something in an encyclopedia , go to the library .
a) Speak louder . I can't hear you .
b) Don't sit on that chair . It's almost broken .
c) Always bring your notebook . You'll need it everyday .
d) Move over here . You'll see the blackboard better .
e) Don't change seats . I want you to be always in the same place .
a) It's cold in here . Shut the window .
b) You are late . Hurry up .
c) Write the date on the blackboard . Take a piece of chalk .
d) Here is your homework for tomorrow . Take your notebooks .
e) Betty , why are you standing ? Sit down .
f) Bernie , this is a test ! Don't look at your friend's paper .
a) Let's listen to the tape .
b) Take your rough book , a pen and a rubber .
c) Listen to the dialogue but don't write .
d) Now , take down notes .
e) Let's check your answers .
f) Don't forget to do your homework .
g) Good , put away your exercise books and leave the classroom now .
a) Please , Jerry , don't worry .
b) Please , read at least two books during the holidays .
c) Please , don't use a pen ; use a pencil .
d) Please , Jane and sandra , don't talk while I'm talking .
a) Jimmy ! Do sit down and be quiet .
b) Never come to shcool with a walkman.
c) Betty ! Do listen to the tapeattentively.
d) Always hand in your papers on time .