A Complete using a, an or the. If an article is not necessary, put a dash (-). Artificial intelligence
In (1) 1960s and 1970s, (2) scientists were confident that computers would be able to think very soon. They thought that it was (3) simple problem: just make computers that could think like the human brain. It seemed easy to make computers that could lay (4) chess, so why not ones that could think about other things? In fact, it wasn't so easy. People carry (5) information about the world and how it works. We know that (6) apple can't speak, for example, or that (7) Moon is a long way away. Although (8) powerful computer can understand (9) simple situation, it's very difficult to program it to understand (10) real world. It will be a long time before we have computers that are truly intelligent​

Hardly had he entered the room when the boss came in. i have lost my key. i can’ t open the door. i used to play tennis when i was younger (used, am used to, used to). he didn’ t see me as he was reading when i came in ( is reading, read, was reading). when he was in the country he visited places where he had played as a boy ( had played, have played, has played). the phone has rung ten minutes after she left the office ( had rung, rang, has rung). when i came in my friend was reading a book, which i had given him the day before (has given, have given, had given). when i was ill my friends visited me every day (have visited, had visited, visited). you look exhausted. what have you been doing? ( have you been doing, have you done). don’ t raise your voice when your daughter cries (raise, rise, heighten). choose the correct words: whenever you are in trouble you can always turn to me for help (to, for; for, to; to, to). tom was very grateful to his friend because she gave a very interesting book to read ( to, about, for). i’m sure you can rely on him (over, at, on). it’s important to sort out the problems as soon as possible ( out, over, about). i think he’ s in a bad mood today. try to talk to him tomorrow ( mind, moon, mood). i haven’ t had any visitors since last summer (before, for, since). don’ t be jealous. your husband is not flirting with anybody ( jealous, jealousy, competitive). he made a good career although he had to survive in a very competitive atmosphere ( trustworthy, competitive, sympathetic). my friend is a very shy person. i think he ll become an artist ( mean, imaginative, shy).

1. a detached house is a house which is not connected in any way with another house. 2. a semi-detached house or semi is a house which is one of the built together. 3: a cottage is a small house, especially in the country. 4. a castle is a large strongly built building made in former times to be defended against attack. 5. a block of flats is a large building divided into separate flats. 6. a palace is a large grand house in which a king or queen officially lives. 7. a bungalow is a type of house which is all on one floor 8. a terraced house is one house which is part of a line of joined houses.