Hawking became world-famous in _______.
A.his thirties in the 1970’s B.the thirties in his 1970
C.his 30s in 1970’s D.the thirties during the 1970
Hawking became world-famous in _______.
A.his thirties in the 1970’s B.the thirties in his 1970
C.his 30s in 1970’s D.the thirties during the 1970
A
in one’s thirties 在某人三十多岁时，in/during the 1970s意思是“在二十世纪七十年代”。