岑然
春芽
共回答了15个问题采纳率:93.3% 举报
The scientists believe ( )they have devoten themselves to ( )sure to come true.
a.that all ,are b.what,is
选项是b.what=the thing which/that
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岑然
The scientists believe ( )they have devoten themselves to ( )sure to come true。 a. that all ,are b.what,is 如果a选项的are改成is也是正确的。因为all在此句中做主语是单数。 如果我的回答对你有所帮助,请点击本页面中的“选为满意回答”按钮,谢谢!