题目内容：

would you like to join us?_______,for i have something important to do.A i will B i'd love to .C
A i will B i'd love to .C i wont Di am afraid not

优质解答

从后面的意思来看,回答者是不想加入他们的,是否定的答案,所以应该选D,语气委婉,而C项前面应该加上No,