Life in cities is much livelier than in the country.A. /B. thatC. itD. the one

问题补充：

Life in cities is much livelier than in the country.

A. /

B. that

C. it

D. the one

答案：

A. /

(答案→)B. that

C. it

D. the one

解析：考查代词。句中that指代前面的life，指代不可数名词。句意：在城市的生活比在乡下更加活跃。