_______it or not ,his discovery has created a stir in scientific ciircles.a.to believe b.believing b.believe d.believed选哪个?为什么为什么选原型，不用ING，或TO DO形式

Hi is not too tall or too short!的同义句 _______it or not ,his discovery has created a stir in scientific ciircles.a.to believe b.believing b.believe d.believed选哪个?为什么为什么选原型，不用ING，或TO DO形式 not...or... HF.HBr.HI.H2S强酸or弱酸? I didn't know whether to save you a place or not原句为“Oh,hi,Fred I didn't know whether to save you a place or not.Why are you so late?” Not Dead or Not Alive to lerve or not? worth it or not file or command not enough or not whether ..or not... whether or not “AND”“OR”“NOT”“+”“-”“&”“^”是什么意思 Why or why not? why or why not Why or Why not 觉觉得答案有点奇怪.关于whether&wheneverYou should take control of your life _______it is planning coursework or picking a major.填whether还是whenever,理由 just to say hi or just say hi?语法上那一个是正确的?