complete the sentences with the words below.there is one extra word.
arrangement,blindness,deafness,discovery, invention,recording
1.in my opinion,the greatest.....................of the 20th century was the mobile phone.
2.the.................of x-rays changed the future of medicine.
3.....................is a problem in my family.my father and my grandfather can t hear.
4.she wasn t there but she listened to the .....................of the interview.
5.i made an .................to see her at the weekend.