阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
(2013·西宁市质检一，D)
If you feel at present that you don't have enough friends in your life, one reason may be that you have let yourself become too busy to make time for the relationships you already have. Starting and keeping friendship requires effort and commitment. Many of us let our lives become so busy with work and other commitments that we don't get around to scheduling time for pleasure and renewal with the friends, relatives and acquaintances we already have.
Making the effort to call your friends more regularly and to accept more of the invitations you receive from others can improve your social life in a hurry!
