1.At harvest time,farmers have their machines _____ from school for two or three months.A.working B.work work D.worked2._______ the machines begins to work, you can't stop it ________.A.while;soon r;right away C.once;at once D.until;immediately3.He _______to see me during my illness.A.have come B.has been coming e D.goes4.When was the PRC _______(found)?

热心网友

1.worked. have....done,使机器工作2.once...at once. 一旦机器开始工作,不可以让它立即停止下来.3.have come. 我生病期间他曾经来看我. unded.创建found的被动形式.

热心网友

1.A.working. have sb/sth doing让某人或某物一直做某事 让机器一直工作两三个月2.once...at once. 一旦机器开始工作,不可以让它立即停止下来.3.B.has been coming 一直都来看我 unded，中华人民共和国是什么时候建立的？

热心网友

我想是.1.worked2.D me4founded

热心网友

4 founded

热心网友

1。A2。C一旦；立即3.B4。founded，中华人民共和国是什么时候建立的？