问题
选择题
She began to play table tennis_________，and became famous_________ .
A．in the 1970’s;in her twenties
B．in 1970s;in her twenties
C．in the 1970s;in her twenty
D．in the 1970s;in the twenty
答案
A
in the 1970’s="in" the 1970s定冠词不可少，意思是“20世纪70年代”；in her twenties意思是“在她20多岁时”。