How long ago do you think bubble gum was invented? 翻译一下,做英文回

How long ago do you think bubble gum was invented? 翻译一下,做英文回 how long do you think.怎么翻译 “bubble gum 求一段翻译thomas adams discovered bubble gum in the 1870s.he was long long ago 谁懂英文,帮我翻译一下, ____paper was invented by ____Chinese people a long time ago How long do you think we can depend on your working here?翻译 who do you think the light bulb was invented 有一处错误请改正谢谢. when do you think ——? A,was the microwave oven invented B th 时态：how long do you think the meeting_(last)? how long do you think it is _____he arrived here? 为什么是How long do you think it will be ...