People who have formed a group tend to be interested in newcomers.

* Hướng dẫn giải

Đáp án là D. Ý trong bài: The next thing to avoid is finding yourself in a group where in fact you

are a stranger, that is, in the sort of group where all the other people already know each other             

Groups generally resent( bực bội) intrusion, not because they dislike you personally, but because they have already had to work quite hard to turn the group into the functioning unit.