1We should keep the food at a low temperature.被动语态 The food

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1We should keep the food at a low temperature.被动语态 The food should ------- ------ at a low temperature.2.How long did it take you to do your homework yesterday evening?改为同义句 How long did you---- ---- your homework yesterday evening?3、He gave me no chance to answer his question.改为同义句He didn't give me a chance to ---- ----- his question .4、I have to be back by 5:00pm对划线部分提问.----- ----- you have to be back

1 be kept
2 spend on/doing
3 reply to
4 When do

1We should keep the food at a low temperature.被动语态 The food we must cook the food a very high temperature for a l We should eat ( )food to keep We should eat up all the food.和We should eat up all our food at the food She should bring some food here.怎么变被动语态? they should do the work at once改被动语态被动语态讲解We always keep the classroom clean.改成被动语态? The tiger made the money get some food(改为被动语态） The monkey wa We should help the poor out .(改成被动语态） we should clean the classroom everyday改为被动语态 We should eat some ______(more)food in the morning