(1)___the international medical conference will be held in S
2个回答

答案是 A.Whether

(1) (Whether) the international medical conference will be held in Shanghai is

(not) known yet.

大家都还不知道,国际医学大会是否会在上海召开.

(p.s.原文中的 now 应该是 not 才对.原因有二:

一、now 和 yet 是不会一起使用的;

二、这里已经有完整的主词 “the international medical conference”,

所以没必要再用 that 了.)