Someresearchersbelievethatthereisnodoubt___acureforAIDSwillbefound.
A.whichB.thatC.whatD.whether在线课程B
解析:
本题考查同位语从句的引导词。题意为:一些研究人员认为,人们一定会找到治疗艾滋病的方法的。Doubt后接同位语从句时,如用于肯定句中,要用whether引导;
如用于否定句中则用that引导。
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