It is not always easy for the public to see ______ use a new invention can be of to human life.A whose B.what C which D.that选B ,Be of to

IF IT IS NOT YOURS,IT ALSO ALWAYS IS Always thought was told me,it is not my Water is not always silent,sometimes it roars! 猜谜：What always travels on foot? 翻译句子：eas猜谜：What always travels on foot?翻译句子：east or west , home is the best? it is always this is not always what happens but it is what should happen特别是what 的用法 What is always before you,yet you can not see it?是什么What is always before you,yet you can not see it? Life is beautiful but it's not always sweet 汉语意思 it is not a big one,but there are always many things to do. It is worth reminding ourselves that this has not always been the case in America tourism was not always as it is today请问这句话是什么意思 谢谢 Love you?It is always hurt and tired,why not choose to make me happy? it becomes clear that just having knowledge is not always enough to work together __. It is always come,even challenge,I did not go away! Why is my life is always not? it is pleasant always?是什么意思 why is it always something? it is not big