4.They are ---- of different presses(出版社).Now they are havin

题目应该是这样的。4。 They are ____ of different presses(出版社)。 Now they are having a meeting in one of the ____ office。A。 editor-in-chiefs, editors-in-chief's B。 editors-in-chief, editor-in-chief'sC。 editors-in-chiefs, editor's-in-chief's D。 editors-in-chief, editors-in-chief's选D第一空 editors-in-chief, 第二空editors-in-chief's 这个单词单数形式是editors-in-chief,第一空主语是they所以得用复数,复合词的复数要加在中心词的后面,所以是editors-in-chief。第二空是所有格,直接在后面加's就行