_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
A.In 1870s, in his fifties | B.In 1870s, in fifties |
C.In the 1870s, in fifties | D.In the 1870s, in his fifties |
_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
A.In 1870s, in his fifties | B.In 1870s, in fifties |
C.In the 1870s, in fifties | D.In the 1870s, in his fifties |