With your help, there is no doubt ______ our plan is meant for will work out successfully.

With your help, there is no doubt ______ our plan is meant for will work out successfully.

选A
句子意思是
有你的帮助，毫无疑问我们的计划将成功。
With your help, there is no doubt that 【what our plan is meant for】 will work out successfully.
同位语从句套主语从句
there is no doubt that xxxxx 是同位语从句
【what our plan is meant for】 是从句的主语，意思是我们计划的目的。
这样可以理解么？有问题再问哟

D

D. that whether

在你的帮助下，毫无疑问我们的计划将取得成功
A

我选A。句型“there is no doubt that...毫无疑问..”。what our plan is ...主语从句吧

D that是There is no doubt that的句型。后面的whether引导的是主语从句。
祝你学习进步！
望采纳，多谢！