Rewrite the sentences that has the same meaning with the previous sentences

Rewrite the sentences that has the same meaning with the previous sentences
      1.  I fed the chickens this morning
           The chickens.........................
       2. The question is so dificult that all the students can't answer it.
           It is such................................
       3.It is 5 years since Tom and Mary got married.
           Tom and Mary........................
        4. The film was so boring that I fell asleep.
             Because..............................