Choose time expressions to write in the sentences below. (yesterday, last tuesday, when i was younger, a year ago, in 1995, today, this week, since 9 o'clock this morning, recently, since june) 1. what have you done ? not much i've been really lazy. 2. i saw, tomorrow . oh, how was he? 3. i started learning english . 4. i've written ten letters . 5. liz and i got married . 6. have you lost weight . 7. it's so dry! it hasn't rained . 8. we had a lovely house .
1.Have you finished your job?
2.Have you passed your driving test?
3.Has the postman come this morning?
4.Have you done your homework?
5.Why haven’t you put on your coat?
положительные-
1.We have bought a new TV set.
2.The students have left the room.
3.The train has just arrived.
4.He has written about a hundred novels.
5.I have already bought that book.
отрицательные-
1.I have not written the letter.
2.I had not written the article.
3.I should not have written the test work.
4.She hasn't written the test yet.
5.He hasn't phoned this afternoon.
While the overall world of robotics is expanding, a robot has some consistent characteristics:
1.Robots all consist of some sort of mechanical construction. The mechanical aspect of a robot helps it complete tasks in the environment for which it’s designed. For example, the Mars 2020 Rovers wheels are individually motorized and made of titanium tubing that help it firmly grip the harsh terrain of the red planet.
2.Robots need electrical components that control and power the machinery. Essentially, an electric current (a battery, for example) is needed to power a large majority of robots.
3.Robots contain at least some level of computer programming. Without a set of code telling it what to do, a robot would just be another piece of simple machinery. Inserting a program into a robot gives it the ability to know when and how to carry out a task.
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