The teacher wants the work ( )at once

The teacher wants the work ( )at once the teacher wants the work（）at once.为什么是to be done 而不是 doing the teacher spoke slowly so that they_____their work at once the teacher wants the work _____at once.A,doing B,being done The teacher insisted that the work should be done at once同义句 the teacher r the sentence once.at last I understood The teacher told me ____(correct) the mistakes at once. they should do the work at once改被动语态 You needn't ____ the work at once then the sons began to work at once是什么意思 We should finish the work at once(对 at once 提问) The teacher tells us____(work) hard at school