When was the telephone invented,do you konw?为什么这里用was不是were?

When was the telephone invented,do you konw?为什么这里用was不是were? A:When was the telephone invented,do you know? you know when the telephone was invented? -Do you konw who invented the telephone? 选取：1 Do you know when the telephone----?A was invented B inv you,know,was,when,basketball,invented,do do you know when basketball was invented do you know when basketball was invented? Do you know ____?A.who invented tea B.who was the telephone 为什么是The telephone was invented in1876而不是a telephone was inve the first telephone was invented in() when was the car invented