The scientists believe ( )they have devoten themselves to ( ）sure to come true.a.that all ,are b.what,is 選項(xiàng)是b.what=the thing which/that如果我的回答對(duì)你有所幫助,請(qǐng)點(diǎn)擊本頁(yè)面中的“選為滿(mǎn)意回答”按鈕...為什么不選a？The scientists believe ( )they have devoten themselves to ( ）sure to come true。a. that all ,are b.what,is如果a選項(xiàng)的are改成is也是正確的。因?yàn)閍ll在此句中做主語(yǔ)是單數(shù)。如果我的回答對(duì)你有所幫助，請(qǐng)點(diǎn)擊本頁(yè)面中的“選為滿(mǎn)意回答”按鈕，謝謝！