這個the poor poorer是什么意思

有這樣一道題：

In some western countries，the rich are becoming richer，and __________.

A. the poor the poor                            B. poor poor      

C.the poor poorer                               D. poorer the poor

此題應選C。這是一個省略句，若補充完整應為：

In some western countries，the rich are becoming richer，and the poor are becoming poorer. 在有些西方國家，富人變得更富，而窮人則變得更窮。

前后兩句謂語相同，后句承前省略。類似的有：

1. I am a teacher and my sister a nurse. 我是老師我姐姐是護士。

(...my sister a nurse=...my sister is a nurse)

2. John won the first race and Mick the second. 約翰贏了第一場比賽，米克贏了第二場比賽。

(...and Mick the second = ...and Mick won the second race)

3. In the accident the son was wounded，but the mother killed. 在事故中，兒子受傷，母親喪命。(...but the mother killed=...but the mother was killed)

有時若后句的主語和賓語等與前句相同，則可一起省去：

4. He did it and quite successfully too at the beginning. 他這樣做了，而且一開始就很成功。(=He did it and he did it quite successfully too at the beginning. )