请各位帮帮忙,我有篇英语作文不知怎么写?

1． 20世纪90年代以来，大批民工流入沿海大城市
2． 民工对城市的建设所做的贡献
3． 民工的大量流入可能带来的问题

(1The early-1990s finds an unprecedented tide of rural workers flooding into big cities such as Shanghai, Guangzhou, and Beijing. (2)According to a recent survey, in Shanghai alone there are more than 2.5 million migrant workers.
(3)There is an ambivalent feeling towards rural workers. (4)No one denies the important contribution rural workers have made to the urban development. (5)They have done most of dirty, dangerous and underpaid jobs in heavy industries, construction sites and other fields that city residents are unwilling to enter. (6)They have become an indispensable part of urban life to a point where the machinery of a city connot operate without those cogs, though small and unnoticed. (7)Yet an anti-migrant attitude runs consistently through the mainstream of urban consciousness. (8)City residents complain that migrant workers have worsened traffic and sanitation problems and have threat