they were i______ by a knock at the door

they were i______ by a knock at the door They were ___________(welcome) by the history. Tea was i______ by accident They were surprised to see that they were b_____ by the river again. 英语翻译:later they were replaced by toys children really wanted They were made(laugh)by the lovely girl适当形式 英语翻译practical value by the time they were finished. they were saved by the clever cat被动变主动 By whom were they made to stand here?翻译, THey were indroduced by an old friend ten years ago They have many pets,i______ three cats. who were they invented by?这个句子的结构是什么?by是怎么回事?急,谢谢帮助. When they woke up,they____(惊奇地发现)that they were by a river. when were electric slippers invented?who were they invented by?what are they used for?什么意 who were computers invented by?when were computers invented?how were computers invented?what are they used for? Everyone is i______ by what he has gone I______(buy) ______( they) at the shopping mall. Andrew's eyes lit up i______ they entered the room