What did people use before paper__________?A.invented B.was inventedWhat did people use before paper__________?A.invented B.was invented可A为啥不行?

what did chinese people use to make fireworks What did people use before paper__________?A.invented B.was inventedWhat did people use before paper__________?A.invented B.was invented可A为啥不行? What do most people use? What do English people use? what did these people sell? What did you use to be like What did your grandma use to 是what did they use to have?还是what did they use to do? When did people f____ begin to use stamps? what did rich people do for fun what did you use to do 的英语作文 What did you use to be like 怎样回答 what did the kids use to make their inventions what do people use mobile phone for的被动句 What do people use water to do的答语是什么? What+does+people+use+besides+words+to+give+direction? What do people use instead of tea leaves是什么意思 what did she use to look like?翻译这句话 use在这里是什么意思