【题目】—Let's go to the park tomorrow morning.
—Sorry, I've got an important appointment at 9 o'clock and I can't _____to miss it.
A.manage
B.help
C.wait
D.afford

【答案】D
【解析】由语境可知，“我”有重要约会，所以不能错过约会，故选D。afford与can或could连用，尤其用于否定句或疑问句。表示“承担得起(后果)”。而A项表示“设法做成”；B项表示“帮助”；C项表示“等待”，均不合乎语意。