【题目】Humans spend a lot of time and money on their pets and the pets give all they have _____for that.
A. in return B. in fact
C. in short D. in all
在线课程【答案】A
【解析】考查介词短语辨析。句意：人们在他们的宠物身上花费大量的时间和金钱，而宠物将它们所有的一切给予人类作为对此的回报。in return作为回报；in fact事实上；in short总之；in all总共。根据前面的give all可知，选A项适合此处语境。