Directions: Fill in the blanks choosing the correct set of prepositions:
_______ the 1920s, communism and social democracy had become the two dominant political tendencies _______ the international socialist movement, _______ socialism itself becoming the most influential secular movement _______ the 20th century.
1
By, within, with, of.
2
Of, within, with, by.
3
Of, with, within, by.
4
With, within, by, of.