时态Years ago we didn't know this,but recent science______that

we didn't know much about each other twenty years ago.we wer Two hundred years ago,people in the West didn't know coffee i didn't know which house （they live in） ten years ago. we know this area,two hundred years ago,was a lake__ but i don't think you can smoke here.I didn't know this is a 英语单项选择 He didn't know that-------ten years to complete this She didn\'t know,but I 反义疑问句可不可以这样：She knew this story,but she didn't know that sto people didn t travel by plane years ago的意思 8.24,It's________thet we didn't know about this before.A ann 英语翻译I wrote this song two hours before we met.I didn't know We Didn't Want You To Know