when do you think the microwave oven was invented为什么用陈述句语序

when do you think ——? A,was the microwave oven invented B th When was the telephone invented,do you konw?为什么这里用was不是were? DO you have a microwave oven A:When was the telephone invented,do you know? you,know,was,when,basketball,invented,do do you know when basketball was invented do you know when basketball was invented? you know when the telephone was invented? who do you think the light bulb was invented 有一处错误请改正谢谢. do you know which is the way to the museum为什么不用陈述句语序 选取：1 Do you know when the telephone----?A was invented B inv Do not use in microwave oven.