anyone phone, tell them I’m in conference.
A. Would
B. Shall
C. Could
D. Should
网友回答
A. Would
B. Shall
C. Could
(答案→)D. Should
解析：考查虚拟语气.在虚拟语气的从句谓语中出现 were, should, had 时， 可以省略if,同时把这个词放到句首，形成倒装。Would should could表示虚拟语气时,其中should语气最强,表示要求,命令等意思.根据句意:如果有人打电话,告诉他们我正在开会.故选D.