_______ is a fact that English is being accepted as an international language.
A、ThereD
为了保持句子的平衡，往往用先行词it作形式主语或形式宾语，而把真正的主语或宾语放到后面，尤其是that引导的主语从句往往用先行词it作形式主语。此句也可以改写为：ThatEnglishisbeingacceptedasaninternationallanguageisafact.
Itisnotdecided________theconferencewillbeheld.
Weather _______, we ’ll go out for a walk.
Childrenhaveanatural________abouttheworldaroundthem.
I was writing a report last night; ________ I would not have stayed up late.
Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.
