________a certain doubt among the people as to the practical value of the project.A．It has B．They haveC．It remains D．There remains

certain certain certain 为什么在it's certain that/to do sth中不能把certain换成sure?要具体解释,有赏! 确定做某事的英语词组be sure to do等不等于be certain to do?又没有一个词组是be certain to do ________a certain doubt among the people as to the practical value of the project.A．It has B．They haveC．It remains D．There remains be certain to do 和be sure to do 的区别we are__to win the match You wait and see .A,certain B,sure C,believe Dthought I was not sure/certain what I ought to do.为什么这样was not可以是I am not sure /certain what I ought to do. ________a certain doubt among the people as to the practical value of the project.A．It has________a certain doubt among the people as to the practical value of the project.A．It has B．They haveC．It remains D．There remains 还有为什么选这个选项John,you neednt do your work today,you do it tomorrow if you`re tired.________A:must B:may C:can`t A：How often do you ______ _______ _____?B:I do it five ________a week.A:________ _______she like singing?B:A lot.She ______every weekend. what can I do for you?-----I can do it myself.Thank,________A instead B however C of course D anyway smoking will certain do harm to your health.还是用certainly They want to do certain things at acertain time. 翻译谢谢 8)Do you agree or disagree with certain modern opinions?用英文写几句小短文 You don't have to be a hero to do certain things to compete. 用be certain to do sth 造句,造四个句子,急用 of course,it's good to do some practice tests but,after a certain point,you don't learn anything new.after a certain