题干
_____ is difficult for me _______ goodbye to my classmates.
A： It, to say
B： It, saying
C：That, to say
D：That, saying
答案(点此获取答案解析）
A
_____ is difficult for me _______ goodbye to my classmates.
A： It, to say
B： It, saying
C：That, to say
D：That, saying
