IV. Fill in the blanks with some, any, no, every and their derivatives:

1. Are there …new instruments in your laboratory? Yes, there are … 2. Do you know … about this phenomenon? – No, I know … about it. 3. If you don’t know how to solve this equation, ask … to help you. 4. I didn’t find my drawing, I think that it is … on your shelf. 5. … knows that water is necessary for life. 6. The problem was so difficult that … solved it.

IX. Infinitive. Complex Object. Complex Subject. For + Noun + Infinitive Clause

1. State the functions of the Infinitive in the following sentences. Translate them:

1. Our task is to study well.

2. The idea to use this substance is not new.

3. He described the device to be used in all modern systems.

4. The apparatus to be assembled is very complicated.

5. To translate the text without a dictionary is difficult.

6. To make the experiment you must improve the device.

7. The engineer wanted to be sent to the conference.

8. Lodygin was the first to invent the electric lamp.

9. In order to solve these problems, scientists must make many experiments.

10. To carry out this research work requires special knowledge.

2. State the functions of the infinitives and translate the sentences.

1. To move from one astronomical body to another means to overcome gravitational forces.

2. To accelerate the gas a high pressure is needed in the rocket chamber.

3. To land a high speed aircraft is a delicate operation even when visibility is good.

4. To produce a large thrust in a rocket requires high mass flow, high energy and high pressure.

5. To do work an object must have energy.

6. To coordinate the efforts of many groups of engineers constitutes a very difficult task.

3. Translate the sentences. Pay attention to the infinitive as an attribute.

1. It all depends on the nature of the problem to be solved.

2. One of main advantages to be gained is that phenomenon may be studied at the moment it occurs.

3. They were the first to employ this method at the plant.

4. The electric circuit is the subject to be dealt with in the present article.

5. Then all the current to be sent will pass through the fuse.

6. A switch is a device to break or to close the circuit.

7. Conductance depends on the size of the wire, its length, temperature and the kind of material to be employed.

8. Glass is the insulator to be often seen on the poles that carry the telephone wires in city streets.

9. Conducting materials are by no means the only materials to play an important part in electronic engineering.

10. Yablochkov was the first to apply a.c. in practice.

4. Change the following complex sentences given below according to the example and translate them.

Example: The process which will be described in this article is known as ionization.

The process to be described in this article is known as ionization.

1. The method which will be used is reliable.

2. The results which will be received will be published next month.

3. The data that are to be obtained will be of great interest.

4. The measurements that must be made should be accurate enough.

5. The experiments which will be demonstrated are closely related to our research.

6. The problem that must be solved is very difficult.

7. The work that must be done is of great importance.

8. The method that will be used was developed in our laboratory.

9. The equipment that is to be installed is very effective.

10. The instrument which will be used must make precise measurements.