11.  They wear the same clothes all yea long, they have the same hair style and there names are replaced by numbers.

12.  The system of this society should be replaced by a more suitable system.

13.  If he was alive at the end of the 20th century, he would replace religion with television.

14.  But if he was alive at the end of the 20th century, he would probably replace religion with television, since TV nowadays is playing an important role in people's daily life as religion did before.

15.  Now at the end of the 20th century, in the same sentence, "religion" is replaced by some with "television".

16.  Nowadays, some people hold that if Marx was alive at the end of the 20th century, he would replace religion with television.

17.  Some people said that if he was alive at the end of 20th centary he would replace religion with television.

18.  Some people think that if Marx was alive at the end of the 20th century, he would replace religion with television.

19.  Some people suggest that if he was alive at the end of the 20th century, he would replace religion with television.

20.  If he was alive at the end of the 20th century, he would replace religion with television."