--Did you write to Mary last month?
--No, but I’ll her over Christmas Day.
A. be seen
B. be seeing
C. have seen
D. have been seeing
网友回答
A. be seen
(答案→)B. be seeing
C. have seen
D. have been seeing
解析：将来进行时will/shall be doing sth.。可用于表达预计即将发生或势必要发生的动作，在一般情况下可和一般将来时换用，用将来进行时则显得更加委婉。