It is only in the study of man himself that the major social sciences have substituted(未完,下面有the study of one local variation,that of Western cicilization.这句话怎么翻译,谁代替谁?

It is the only It is the only. -When is the Nation Dayof the PRC?-It's________.A.on 1st October B.in 1st OctoberC.on 1st of the October D.in the 1st of October什么时候用in?什么时候用on? What is St.Petersburg?I only know it is a city of Russia.But I don't know Is it the biggest city of Russia?Is it the biggest port(港口）of Russia?Is it the oldest city in Russia?Please give me the correct answer,thanks very much. ---When is the National Day of the PRC? ---It's _____.A on 1st October B in 1st October C on the 1st of OctoberD in the 1st of October The ------is very lovely it lives only in Australia It is n_ to learn English well in the 21st century Halloween is on October 31st.It is one of the most favourite holidays for children in the USA. there is not much milk in the glass ,there is only a -------in it when is the school trip?------ May 1st A.at B.It's C.Is D.In Which of the following statements about St.Petersburg is TRUE?A.It is the capitalof Russia.B.It is the biggest city of Russia.C.It is the biggest port of Russia.D.It is the oldest city in Russia. 同义句It is believed that on December 21st,1891,the first basketball game in history was played. sarah:ls her birthday in january?jim:( ),itis.sarah:()the()?jim:january 1st.sarah:oh!it is()() 看不懂英文 the nova air purifier system is a revolutionary new air purifier that is designed for living in the 21st centurywith its contemporary styling and state of the art technology,it not only looks good but also offers you the promise of cl only certain thing in the world is that it is full of uncertai Nothing in the world is to be feared,it is only to be understand是什么意思? Is it happy to be the only child in the family? The students of the school is m_____ boys,there only a few girls in it.