they believe it to be helpful and interesting翻译,用到了哪个语法 急

求助一道GMAT语法题~Astronmers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.(A) that they believe is(B) that they believe it to be (C) they believe that it is important for you_____yourselfA.believe B.believingc.believes D.to believe选什么 理由呢 选择:They greed with hin,but it didn't mean ___ him.A.to believe B.believed in C.believing in为什么? they all believe it is in great help to students为什么将in改成of, they believe it to be helpful and interesting翻译,用到了哪个语法 急 they believe that creative marketing is all it takes to move a product? ( ),they lost the baseball match because of their carelessness~A:Believe it or not B:If you believe it or not C:Whether believe or notD:You believe it or not People tend to believe what they believe是什么意思? —— ——（既然）they don't believe us,it's unnecessary to talk with them 英语单项选择题,最好说明原因They would have accomplished the project,but they 空格 abroad for a conference .空格里为什么是 went.空格 it or not，his discovery has created a stir in scientific circlesa believe b to believe c Bel Do yuo think it is going to snow tonight?A.I believe not. B.I don't believe. C.I don't believe it. D.I believe not so.能不能解释一下BCD的错误? --Do you think it's going to rain over the weekend?---____.A.I don't believe B.I don't believe it C.I believe not so D.I believe not 求Do you think it’s going to rain over the weekend?A.I don’t believe B.I don’t believe it C.I believe not so D.I believe not It's only the fairy tale they believe.now,I think I can believe it. She showed it to both men and only them did they believe her.这里showed后面可不可以去掉it,it有什么用法 It's up to you.I believe Believe it or not meant to be —Do you think it`s going to rain over the weekend?_ ________A:I don`t believe B:I don`t believe itC:I believe not so DI believe not