--- I’d like to introduce my best friend to you , Peter .---- Thank you , Lucy . But we __________already .
——Which is your teacher? ——The one _________ thick glasses is.
There __________ a teacher and seventy—two students in the classroom.
——Is he heavy? ——No, he is a little bit ________.
Cindy often gets to school __________.
——Do you want to have _______ apple? ——Yes. please.