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1. I am playing tennis with my friend now.
2. We are walking on the beach now.
3. They are having a great time at the camp at the moment.
4. Angelas is painting a beautiful picture now.
5. Tina and Pam are staying in a five-star hotel.
6. It is rainning outdoors at the moment.
7. Bobby is preparing for the test in his room.
8. The dog is barking at some stangers.
9. The water is in the kettle boilling.
10. Somebody is knocking at the door.
11. The children are stilling sleep.
13. You are watching the sunset now.
14. The girls are choosing the costumes for the party
15. We are waiting for the bus at the bus stop.
16. A little girl is crying.
1. a
2. b
3. c ?
4. a
5. c
6. a
1. Mouse is a device to move the cursor or pointer on a display screen.
2. Because the connecting wire looks like a mouse tail.
3. Mice usually have two buttons and sometimes as many as three, which have different functions depending on what program is running.
4. The mouse was invented by Douglas Engelbart.
5. In 1963.
6. Stanford Research Center.
7. Mice can be:
1. Mechanical with a rubber or metal ball that can roll in all directions. Mechanical sensors in the mouse detect the direction the ball is rolling and move the screen pointer.
2. Optomechanical with optical sensors to detect motion of the ball.
3. Optical with a laser to detect the mouse’s movement. Optical mice have no mechanical moving parts but they are more expensive.
4. Cordless infrared mice send infrared or radio waves to communicate with the computer.
3
1. There are men on bicycles.
2. These stories are very interesting.
3. These children are my sons.
4.
1. Usually the classes begin at 9 o’clock.
2. John is playing a game of tennis. He has been playing for 2 hours.
3. Now Lena is waiting for Dennis at the museum.
