问题
单项选择题
Mary forgot（）a letter to her mother, so she wrote to her just now.
A.writing
B.to write
C.having wrote
D.to have written
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
Mary forgot（）a letter to her mother, so she wrote to her just now.
A.writing
B.to write
C.having wrote
D.to have written
参考答案：B
