Do you believe _______man will be able to live on the planet

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/11 07:53:13

Do you believe _______man will be able to live on the planet Mars in the future?
这是一道宾语从句的题目,要填that 或if whether,我认为应该填if whether,因为是疑问句,而且是believe,可是答案却是that.请问为什么?

elieve 这类词无论是肯定还是否定形式都是只有一种可能
这里无论做肯定回答还是否定回答都只有一种肯能
只能用that,不能用if/whether
只有wonder,not sure,be afraid ,doubt等不确定意思后面才能用if/whethe

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