are you sure __ simon will come tomorrow?yes,but i'm not sure __ he will help you or nota that whether b if whetherc that thatd if that

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are you sure __ simon will come tomorrow?yes,but i'm not sure __ he will help you or not
a that whether
b if whether
c that that
d if that

a

选A，第二句话的后半截很明显是个选择性的，所以选whether，第一个空选that，它引导的是一个定语从句。全文翻译：你肯定simon会来吗？
是的，但我不确定他会不会帮你。

选的D 前面“是否会来”，后面“已经有or not 就不必在用whether/if",
希望你满意这个答案

英语翻译Are you sure? Are you sure? sure .here you are. ARE YOU SURE{?}THAT? are you sure 英语翻译Are you sure? are you sure? really?are you sure? are you sure they are sure.Here you are这句呢 Are you sure of that Sure.Here you are.怎吗念 are you sure 什么意思 u mean are you sure you are sure have fan Make sure you are my Sure you are my fate. we are sure that we will win (同义句) we are sure __ __ __ in the game