用现在进行时的被动语态改写下列句子

楼主好,
1.A computer is being built for the students by them.
2.The test-tube baby is being taken good care of by his parents.
3.The human cloning is being studied by some scientists.
4.This question is being discussed at the meeting by them.
5.The test is being given in the next room by the teacher.
再问： 第一句的for students呢？ 第三句的the可以加进去吗？
再答： . A computer is being built for the students by them 有 for students哦 可以用啊