[D41] It has been proved ______ eating vegetables in childhood helps to protect youagainst serious illness in later life.A.if B.because C.when D.what请翻译,并分析.

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[D41] It has been proved ______ eating vegetables in childhood helps to protect youagainst serious illness in later life.A.if B.because C.when D.what请翻译,并分析.
[D41] It has been proved ______ eating vegetables in childhood helps to protect you
against serious illness in later life.
A.if B.because C.when D.what
请翻译,并分析.

[D41] It has been proved ______ eating vegetables in childhood helps to protect youagainst serious illness in later life.A.if B.because C.when D.what请翻译,并分析.
答案的确是that,估计是楼主打错答案了.
翻译：已经证实,儿童时期食用蔬菜有助于保护你免受后期生活中重大疾病的侵扰.
1.此句中,it为句子的形式主语,而proved后面的从句才是该句的真正主语,即为主语从句.
该主语从句中,eating vegetables in childhood helps to protect you against serious illness in later life并不缺少任何成分,所以只需用that引导即可.
2.if/because都不能用于引导主语从句,排除AB；
when表示从句缺少时间状语,what表明从句缺少表sth的主语/宾语等,都不对.

应该是that

[D41] It has been proved ______ eating vegetables in childhood helps to protect youagainst serious illness in later life.A.if B.because C.when D.what请翻译,并分析. 运行 pr 时出现 a buffer overrun has been detected which has corrupted the pr it has been since.用法 It has been in my it is/has been= It's has been accepted it has long been assumed it's always been you(It has always been it has been可以缩写成it's been it's been.的全称是不是 it has been... It has been raining these days. It has been e()hot this week. it has long been known that it has since been rebuilt怎么翻译造句it has been +时间段+since从句it has been +时间段+since从句 it has been used和it has been in use有什么区别吗是It has been paid还是 It has been paid for? 为什么是It has been paid而不是 It has been paid for?