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
单项选择题 Mr. White has a wife and three children to（）
单项选择题 I know it isn't important but I can't help（）about it.
单项选择题 I think all these are main points（）much attention.
