题目内容：

This book___ published by the end of this year A.will be B.will C.is being D.will have been
求讲解

优质解答

首先,book 是被出版,应用被动语态,排除B.
其次,今年末是将来的时间,用将来时,排除C.
by +时间点,需要用完成时态,排除A,因此正确答案是D.