I. Substitute the modal verbs can, may and must by their equivalents.
1. At present every student are able to explain the origin of the universe.
2. No one is allowed enter the lab while the test is going on.
1. According to the plan you must begin the test at 5 o’clock sharp.
2. You must rely on your friends.
3. You can share equity between the employees.
4. No one may leave the class without teacher’s permission.
5. You could study better at the University.
6. You must help your friend whenever you have time.
II. Put the following sentences into the interrogative and negative forms:
1. You must be very attentive while working.
1. You may find yourself continually starting new projects.
2. They should be at school.
3. You have to ask permission when you leave your working place.
4. You may need people who’ll help you in your research.
5. The company will have to share equity between the shareholders.
6. You may be able to explain your absence.
Put the proper words into sentences:
analytical, digital, unreliable, sophisticated, solve, core, processor, computations, an integral circuit.
1)The Difference Engine could ... equations and led to another calculating machine, the ... Engine, which embodied the key parts of a computer system: an input device, a ..., a control unit, a storage place, and an output device.
2)Ada Lovelace helped to develop instructions for carrying out ... on Babbage machine.
3)J. Atanasoff devised the first... computer to work by electronic means.
4)First-generation computers were ..., the main form of memory being magnetic...
5)In the third generation software became more...
6)What was the name of the first ... computer to work electronically?
7)When electricity passed through the ..., it could be magnetized as either “ofF’ or “on”.
8)A ...is acomplete electronic circuit on asmall chip of silicon.
Ex 1
1. in year four seasons
2. My favorite season is summer
3. It's warm in the summer, you don't need to go to school, you can hang out with friends on the street until late
4. walk outside
5. Stay at home and play computer games
6. weather in Krasnodar in sprink sometimes cold sometimes warm
Ex 2
Present Simple
1. I sometimes plays computer Games
2. I usually walks with me friends
Present Continuous
1. We are cooking now
2. I go to park with my family at the weekend
Present Perfect
1. I have readed a book
2. They drunk water
Ex 3