把下列英语句子变为被动语态1、Where did they grow vegetables?2、We must keep the noise under 50 dbs(分贝) here.

求英语解答：把下列句子变为被动语态 把下列英语句子变为被动语态1、Where did they grow vegetables?2、We must keep the noise under 50 dbs(分贝) here. 英语：把下列句子改写成被动语态 把下列句子变为被动语态 The policeman was questioning the thieves at this time yesterday. 把下列句子改成被动语态,一空一词 . 把下面句子变为被动语态.6---9 将下列句子变为被动语态1people speak English in usa 帮个忙明天要考试 把下列句子转换成被动语态Where did they buy the new keyboard?_____ _____ the new keyboard _____ ? 把两个英语句子改写为被动语态 英语 把句子改为被动语态 英语:主动语态变被动语态请将下列被动语态变为主动语态:1:TV programmes are shown on television_________________________________________________2:Books are read by people of all ages______________________________________________3 英语?句子变被动语态!、? 将下列句子变为被动语态he is buying his son a bike now She will finish her homework as soon as possible (判断时态：被动语态 否定句 一般疑问句把原句子变为下列时态 即 被动语态 finish--finished--finished否定句一般疑问句 Julie Thompson invented the cars in 1885 (判断时态：被动语态 否定句 一般疑问句把原句子变为下列时态 即 被动语态 invent--invented--invented否定句一般疑问句 Many people speak English in Singapore(判断时态：把原句子变为下列时态 即 被动语态 否定句一般疑问句 把下面句子变为被动语态I will send a message immediately 把句子变为被动语态 My mother often tells me to be careful.