there were four powerful means of transmitting and receiving information,为什么要用of.去掉他,现在分词transmitting and receiving information直接作定语行吗

there were four powerful means of transmitting and receiving information能改成there were four powerful means to transmit and receive information吗 We were there ___ four o'clock 填介词 at ,on 或 in there were four lessons in the morning.这句话话对吗/ There were If four of them were There were four green cats in the house.(four green cats 划线）（对划线部分提问）___________ ____________ ____________in the house? if there were four flies（苍蝇）on thetable and i killed one,how many would be left?中英都要、 (it is ） four years since we last saw each other.这句话括号里为什么不是there were There are four words.翻译 一定要mp3格式的The Brothers Four Once there were green fields,kissed by the sun.Once there were valleys,where rivers used to run.Once there were blue skies,with white clouds high above.Once they were part of an everlasting love.We were the love 用There were和There were造句 ．---- Were all the passengers on the bus injured in the accident sent to hospital?---- No,_____ only the four who got hurt seriously.A.there was B.there were C.that was D.it was 27．---- Were all the passengers on the bus injured in the accident sent to hospital?---- No,_____ only the four who got hurt seriously.A.there was B.there were C.that was D.it was there was,there were造句, 脑筋急转弯（英语）答案!If there were four flies（苍蝇）on the table and i killed one ,how many would be left?这是脑筋急转弯 If there were four flies on the table and Ikilled one,how many would be left?呵呵，very thanks,但是可以说下答案的意思吗 脑经急转弯：If there were four flies(苍蝇） on the table and I killed one,how many would be left? there were four powerful means of transmitting and receiving information,为什么要用of.去掉他,现在分词transmitting and receiving information直接作定语行吗