题型:语法填空-单句语填
难度:0.85
引用次数:179
题号:21664659
I doubt ________ the scientific breakthrough will have a profound impact on the field of medicine. (用适当的词填空)
更新时间:2024/01/30 20:27:56
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【知识点】 that,if, whether引导的宾语从句