the students enemy

One day there was an english class and they were reading their books when the counselor walks in. She asks if anyone wants to take the college placement test and some of the students raise their hands.
So she tells them to go and sign up. She then tries to advertise the test by telling the students to tell all of their friends.
One student very loudly says "I dont have any friends."
So the teacher tells him, "Well then tell your enemies."
So he very quickly says then, "Teacher the counselor wants you to go take the college placement test."