About of the workers in the factory were born in the________.

A: two thirds; 1970 B: two thirds; 1970s C: two third; 1970 D: two third; 1970s

About ________ of the workers in the factory were born in the ________.

A: two-thirds, 1970 B: two-thirds, 1970s C: .two-third,1970 D: two-third, 1970s

About _________ of the workers in the factory were born in the _________ .

A: two-thirds; 1970 B: two-thirds; 1970s C: two-third; 1970 D: two-third; 1970

About ________ of the workers in the factory were born in the ________.

A: two-thirds, 1970 B: two-thirds, 1970s C:two-third, 1970 D: two-third, 1970s

In ____, he began to learn Russian, when he was in ______.

A: 1970; the 50’s B: the 1970; his 50s C: the 1970s; his fifties D: 1970s; his fifties

Hawking became world-famous in .

A: his twenties in the 1970’s B: the twenties during the 1970 C: his twenties in 1970’s D:the twenties in his 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

.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