两道英语选择题。这两道题该怎么做?为什么?
两道英语选择题。这两道题该怎么做?为什么?
( ),many poor people in Shandong province had to move to the northeast of China to make a living.
A.In the 1960's B.During the 1960's
C.At the 1960s D.During the 1960s
( ) when Marx was in his fifties,he began to learn Russian.
A.In 1870s B.In 1870's
C.In the 1870's D.In his 1870's
这两道题该怎么做?为什么?