A、Toillustrate that theembryofossilsarequiteadvancedin theirdevelopment.
B、To explain why the fossils are well preserved
C、To explain why the fossils are well preserved
D、To prove thatichthyosaursare marineanimals
下面的短文有10处空白,短文后列出12个词,其中10个取自短文,请根据短文内容将其 分别放回原有位置,以恢复文章原貌。Immigration and ProblemsHundreds of thousands of people supporting immigration rights in the US filled streets all over America in early 2006.Many held signs and American flags and asked to be___31___as citizens rather than criminals.Senator John McCain held the opinion that the country should open a ___32___to citizenship to immigrants (移民) who were already in the country illegally, while other politicians ___33___for stricter measures—including rounding up undocumented immigrants and sending themback to their home countries.Canadian officials say that immigration applications continue to rise.Some want to keep the doors___34___. They need the labor. About 400.000 immigrants were allowed into the country in 2005, according to the Canadian Government statistics.___35___.all this growth means that cities need to adapt. New comers don't always make a smooth transition into jobs for which they are skilled.So industries are using mentoring (辅导) programs to help new___36___find proper jobs.With the large numbers of undocumented African immigrants arriving in the Canary Islands, the Spanish Government has decided to get___37___. There will be no more mass amnesties(特赦) forthe illegal immigrants, and anyone coming to Spain without___38___will be sent back.France's new immigration and integration law gives the government new powers to encourage high-skilled migration. It takes___39___in 2007.The new law authorizes the government to help these identified employers find immigrant workers with needed skills or qualifications. The selected foreignemployees will be granted“skills and talents”visas(签证) .But some people show the concern thatit'llcause braindrainin___40___countries.