With your help, there is no doubt our plan is meant for will work out successfully.
A. that what
B. whether that
C. what that
D. that whether
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(答案→)A. that what
B. whether that
C. what that
D. that whether
解析：考查从句。there is no doubt后面的整个句子是doubt的同位语从句，doubt用在否定句中，同位语从句用that引导；排除B,C； our plan is meant for是主语从句，且从句缺少for的宾语，所以用what引导。选A。