She looks sad.Could you tell me ____that prevents her from being as happy as before? A.what it is is what

熱心網友

She looks sad.Could you tell me ____that prevents her from being as happy as before? A.what it is is what賓語從句中含特殊強調句,強調what,正常詞序是it is what that prevents her from being as happy as before,what 作為引導詞要放在前邊;

熱心網友

A　賓語從句！