將下列句子改為被動語態~!
1.將下列句子改為被動語態： （1）.He wrote a letter this morning. (2).The management has not approved her plan. (3).We have sent for the doctor. (4).We must ship the goods before the end of september. (5).The murse takes good care of the children. (6).They gave him a warm welcome at railway station.2.填空： （1）.It is said that the new copies of the book _____(print) . 用現在進行時. （2）.Our products_____(guarantee)for 3 years. 用一般現在時. （3）.The old house _________(pull)down next mouth. 用一般將來時. （4）.Many of the technigues df modern advertrhsing______(develop)in magazine ads. 用一般過去時. （5）.Two hundred more such house ______(build) next year .用一般將來時.