Ex. 1 Complete this telephone conversation with the correct Present Perfect form of the verbs in brackets (present perfect or present perfect continuous).
Martha:Where (be) for the last hour? We (get) quite worried about you since you didn't arrive at 8!
George:We (be) stuck in traffic for nearly an hour, but we should be there soon.
Martha:OK. We (wait) to start dinner for ages, but we can wait a little longer.
George:Sorry about that, but it's not the first time we (have) such trouble. This place is terrible for traffic at this hour! I (never see) it so congested!
Martha:Yes, I know. Where are you now?
George:Well, we (just pass) the big hospital, which is about two kilometres from your house.
Martha:Oh, yes. You'll probably need another 20 minutes, because they (mend) the road for the past week. It's all blocked off, so you'll have to turn off before the petrol station.
George:OK. See you soon. Bye.
There isn’t a person in the world who doesn’t know about Bill Gates. He is the founder and co-leader of Microsoft Corporation. He is also an American business magnate, who is considered to be one of the richest people on the planet. Bill Gates was born on the 28th of October 1955, in Seattle, state Washington. His full name is William Henry Gates III. For several years he has worked as a chief executive of Microsoft, but later he became a chairman of the company. Apart from being one of the richest and best known people in the world, Bill Gates also wrote several interesting books and currently he works a lot on Bill & Melinda Gates Foundation, specializing in charity donations. In 2010 he has even suggested the billionaires to transfer half of their state to charity. Bill Gates originally comes from a quite intelligent family. He studied in the most privileged school in Seattle, where he developed his programming skills at school computer. In 1973 he enrolled at Harvard University, but was expelled after two years and immediately started working on software development. And in 1975 Gates together with Paul Allen founded the company Micro-Soft, which was later named Microsoft Corporation. His software has literally changed the world. Nowadays nearly everybody uses Microsoft software on daily basis.
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