it's uncertain whether the medicine will work on this cold的反义疑问句是什么?

it's uncertain whether the medicine will work on this cold的反义疑问句是什么? it's uncertain ______ the experiment is worth doing为什么不能用that It's uncertain ______ the experiment is worth doing.A.if B.that C.how D.whether The history of April Fool's Day or All Fool's Day is uncertain,but the current thinking is that it The history of April Fool's Day or All Fool's Day is uncertain,but the current thinking is that it It‘s uncertain () the experiment is worth doing. A.if B.that C.how D.whether 求解释~O(∩_∩)O~ 关于主语从句的题目...It's uncertain ___(填that还是whether) he will go to Beijing.这里是“他去北京这一事实不确定”呢 还是“他是否去北京不确定”呢 英语翻译No trading when it is uncertain.或者语法错误.希望简洁一点..... It was uncertain whether he would come.中的whether是什么语?表语还是主语?急. ——— is uncertain now.A.where did she put it B.where she put it求语法点. 英语翻译第一个问题：It is not unusual to witness that an increasing number of children are accompanied by parents on their first day in college.I declare in no uncertain terms that it will end up with the children’s lack of independence. an uncertain future还是a uncertain future? What it wasto become was uncertain until betweeen 405and 3.8 billion years ago when the dust settle If you’re uncertain about how to spell a word or which phrases to use,look it up.中文翻译 What it wasto become was uncertain until betweeen 405and 3.8 billion years ago when the dust settle life is so peculiar .so uncertain .how little a thing it take to destroy you or save you 意思 英语翻译While admitting that this forecast was somewhat uncertain,the scientists warned against treating it as a cry of wolf. 否定词缀的词不表否定吗比如说it is uncertain that 的反义疑问句用isnt阿