请问Many things now cost double what they did a year ago这个句子的结构和语法是怎么回事?这里cost的用法,还有为什么用what they did

请问many things是什么意思 Many things now cost double what did a year ago.请问这里的what起什么作用 but many things that can't be seen now many things Many things seemed ( ) a hundreds years ago,but now they've all come true (6/6) means.For now I do know it means so many things. (6/6) means.For now I do know it means so many things. nothing can beat me,now seem to me is impossibe.many things also can beat me. 请问Many things now cost double what they did a year ago这个句子的结构和语法是怎么回事?这里cost的用法,还有为什么用what they did 翻译many things. still many things是什么意思 many intersting things (t ) I will remember what you have said .Many things have not forever but I only wane now. Luckily,with the development of China,many things have ______ ,and children can get a goodeducation now. students spend their summer vacation （ ）many kinds of things now.A .do B.doing C.buy D.buying Now I know I can believe you ( ) many things.A.in B.for C.on D.with It's cold now.please put on your s_____,children.It's cold now.please put on your s____,children.They s____ many cheap things to us. I have many things to do.请问to do在句子里做什么成分?