They think the actors act better than in Spaceman on Earth.A. those B. the one C. that D.

问题补充：

They think the actors act better than in Spaceman on Earth.

A. those

B. the one

C. that

D. /

答案：

(答案→)A. those

B. the one

C. that

D. /

解析：those 指示代词，那些；the one特指某一个；that那个。比较级中常用that来代替与前文重复的内容，本句中than后面代词指代前文提到的the actors复数形式，故用复数指示代词，选A。