a . Circle the correct option. 1 They played a joke on their biology/history teacher. 2 They looked in books / on the Internet for April Fool's jokes. 3 They made it look like there was a murder in the classroom / the main hall. 4 They prepared it at lunch time / break time. 5 They waited for the teacher to arrive leave the classroom 6 The teacher ooked worried / angry. 7 The teacher told / didn't tell the class an April Fool's joke. ​