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?

We should keep the nice room clean We should try to keep the（平衡）of nature we should keep the water clean(改为一般疑问句） We should keep the water clean 的汉语意思是? we should keep the air ___ ___ ___ (清新) should we diet in the order to keep fit we should keep the river clean.(一般疑问句） .We should keep off the grass.（改为同义句） We should keep the baby ___(save)from danger. We should keep quiet in the reading room .We should keep quiet in the reading room .（改同义句） You should keep the Should we dietto keep fit 六年级划线部分提问We should keep quiet in the library划线部分是keep quiet We should keep the environment clean.We must not pump s___ into the river We should keep quiet in the l____ when we read books in it. we should keep quiet in the l__when we read books in it We should keep ( ) in the reading-room.A:We should keep ( ) in the reading-room.A:quiteB:quitetly C:quiet D:quickly we should open the window to keep the air f______.首字母填空