Do you know — In the 6th century.A.who is the abacus invented B.Do you know — In the 6th century.A.who is the abacus invented B.when the abacus is invented C.when was the abacus invented D.when the abacus was invented

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Doyouknow—Inthe6thcentury.A.whoistheabacusinventedB.Doyouknow—Inthe6thcentury.A.whoistheabacusinvent

Do you know — In the 6th century.A.who is the abacus invented B.Do you know — In the 6th century.A.who is the abacus invented B.when the abacus is invented C.when was the abacus invented D.when the abacus was invented
Do you know — In the 6th century.A.who is the abacus invented B.
Do you know — In the 6th century.A.who is the abacus invented B.when the abacus is invented C.when was the abacus invented D.when the abacus was invented

Do you know — In the 6th century.A.who is the abacus invented B.Do you know — In the 6th century.A.who is the abacus invented B.when the abacus is invented C.when was the abacus invented D.when the abacus was invented
选D～～～～～～～～～～～～～算盘是什么时候发明的．

翻译：
你知道吗？ - 在6世纪。 A.谁是发明了算盘B. 你知道吗？ - 在6世纪。 A.谁是算盘发明B.当算盘被发明。当被珠算发明D.当算盘的发明

选D。这句话的含义是：你知道算盘是什么时候发明的吗？
这里后面的选项是用作宾语从句。疑问句中，从句的格式用陈述句语序。所以be动词要放在宾语前面。因为发明算盘这个动作是在过去发生的，所以从句要用一般过去时态。be动词要用was.

Do you know the boy in b____ Do you know the girl in the yellow ()[shirt;skirt]. Do you know the boy in the room?如何翻译? Do you know what the wordwheel m_____ in chinese. “do you know what our life likes in the future? Do you know how Halloween_____(celebrate) in the West? 连词成句 do,know,the,in,you,man,black Do you know which c_____ is the biggest in China? Do you know how to score in the Do you know a______ in the new school? Who other do you know in the city Do you know the girl who is in the red dress?Do you know the girl____ ____ ____ ___? 英语翻译do you know这首歌曲的歌词翻译..do you know?do you know?do you know what it feels like loving someonethat's in a rush to throw you away?do you know,do you know,do you know,do ya?do you know what it feels like to be the last oneto do you know the man with red coat和do you know the man in red coat有什么区别? Do you know the way? do you know the mean do you know nanjing massacre in the word 2 what do you think of it? How do you know to score in the game?和 do you knHow do you know to score in the game?和 do you know how to score in the game?