The old man kept on studying Chairman Ma

问题选择题

The old man kept on studying Chairman Mao’s ___ in his ___.

A．work . sixty

B．novels, sixtieth

C．works, sixties

D．books, sixty’s

答案

答案：C

第一空表示作品或著作，所以用works; in one’s sixties 意思是：在某人六十多岁。所以C选项符合题意。