is not yet decided.
A. Whether he will write the book
B. Whether will he write the book
C. If he will write the book
D. If will he write the book
网友回答
(答案→)A. Whether he will write the book
B. Whether will he write the book
C. If he will write the book
D. If will he write the book
解析：考查主语从句。主语从句应该使用陈述语序。排除BD，if不能引导主语从句，排除C项。结合句意可知A正确。句意：他是否会写这本书还没有决定。