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ward sister sarah brown is responsible for the welfare of 28 patients on two wards at london hospital where she (a1) … for the last 6 years. she (a2) … a staff of 12 people. there are also 15 students nurses who (a3) … to the ward at any time. it (a4) …, she says, that 200 people – doctors, nurses, students, visitors – (a5) … through her wards every day. sister brown, who is 39, (a6) … as a nurse 20 years ago.
a1. 1) worked; 2) was working; 3) had worked; 4) has been working.
a2. 1) directs; 2) is directed; 3) has directed; 4) has been directing.
a3. 1) assigned; 2) have been assigned; 3) have assigned; 4) are assigned.
a4. 1) has been calculated; 2) is calculate; 3) had been calculated; 4) calculates.
a5. 1) have moved; 2) is moving; 3) are moving; 4) moved.
a6. 1) were qualified; 2) was qualified; 3) qualify; 4) has been qualified.

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. 

Mobile Phones

Almost everyone has a mobile phone today. Our phones are very useful. We use them to call our parents and friends, search the web, send messages... and, sometimes, play some games!

We love our mobile phones. We think that our life would be impossible without them.

But our parents often get grumpy when they see that we are doing someting in our phone instead of just talking to them.

I think, that even though we sometimes are desperate to talk to a friend, communicating with your mum would be better. Always remember your parents!:)