_______ a certain doubt among the people as to the practical value of the project.A.It has B.They have C.It remains D.There remains这个题为什么选D?选C为什么不行?

It's widely accepted that young babies learn to do things because certain acts lead to _______.A.rewards B.prizes C.awards D.results a certain just missed a certain date certain 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 a certain什么意思 in a certain way act in a certain in a certain sense You don't have to be a hero to do certain things to compete. of course,it's good to do some practice tests but,after a certain point,you don't learn anything new.after a certain Scientists found that when certain parts of the brain were _____ we lost the ability to do certain things.A． destroyedB． damagedC． woundedD． hurt would rather _______ A.to do B.do certain certain certain a certain food怎么翻译?（a certain?） Do the twins go home by bus(同义句)Do the twins _______ a bus _______? a certain country什么意思