the musicians were to play jokes on each other 这句中为什么要加介词to?

介词填空( )21.It’s wrong to play jokes ___ other people.A.on B.o they were happy to be with each other on the ship called the they were happy to be with each other on the ship (which was Why can people play jokes on each other on April Ist? They were ----busy -----with each other----the time Atoo,to the two friends were ________ pleased to see each other play jokes on sb和play jokes to sb的区别 We were ----(please) to meet each other. Mark Twain,the famous American writer,liked to play jokes on like friends talking to each other为什么加ing People like to play t_ on each other on April Fool's Day. xu qian loves to play jokes on hei friends