— Tom, did Mr. Li join you in your discussion?
— No, he＿＿, but he happened to have fallen ill.
A. would like to
B. will
C. was to have
D. was going to join
网友回答
A. would like to
B. will
(答案→)C. was to have
D. was going to join
解析：C项是was to have joined us in our discussion 的省略形式。was／were ＋ to have done表示原来计划、安排要做的事，而实际上并没有做。