Telephone
People have invented many useful devices. One of the most interesting and widely-used inventions is the telephone. The modern phone that we use today is the result of work of many people. The first person to have patented the telephone in 1876 was Alexander Graham Bell. He is credited as the inventor of this practical device. Other scientists who also worked on telephone invention were Elisha Gray, Antonio Meucci, Thomas Edison and some others. The 20th century was the era of phone development and modernization
Люди изобретали много полезных устройств. Одним из наиболее интересных и широко используемых изобретений является телефон. Современный телефон, который мы используем сегодня, является результатом работы многих людей. Первым человеком, который запатентовал телефон в 1876 году, был Александр Грэхем Белл. Ему приписывают изобретение этого практичного устройства. Другие ученые, которые также работали над изобретением телефона, это Элиша Грэй, Антонио Меуччи, Томас Эдисон и некоторые другие.20-й век был эпохой развития и модернизации телефона.
2.
2 I am not enjoying this party very much. Shall we go home?
3 Kate's friends aren't waiting for her because she isn't ready.
4 I'm looking for my mobile, but you aren't helping me!
5 Harry's mum is trying to choose a jacket for him, but he isn't looking at the jackets. He is looking at the DVDs.
3.
2 Are you making a cake? Yes, you are.
3 Are we moving? No, we aren't.
4 Is the rain coming in? Yes, it is.
5 Is your brother winning? No, he isn't.
6 Are they playing well? No, they aren't.
16) A
17) C
18) B
19) C
20) A
21) A
1) he is a technician.
2) the tickets is in his bag.
3) the mechanics is in the shop.