IV. Find mistakes in the sentences according to the text and underline them.

1.Biology sometimes called biological chemistry is the study of chemical processes within, and relating to, living organisms.

2.Over the last 40 years biochemistry has become so successful at explaining living processes that now almost all areas of the life sciences from history to geography are engaged in biochemical research.

3.Biochemistry is closely related to atomic biology, the study of the molecular mechanisms by which genetic information encoded in DNA is able to result in the processes of life.

4.Depending on the exact definition of the terms used, molecular biology can be thought of as a branch of biochemistry, or biochemistry as a tool with which to investigate and study molecular biochemistry.

5.The biochemistry of the cell also depends on the reactions of smaller molecules and ions.

6.The mechanisms by which cells harness energy from their chemical reactions via environment are known as metabolism.

7.Most rare elements on Earth are needed by life (exceptions being selenium and iodine), while a few common ones (aluminum and titanium) are used.

8.Most organisms share element needs, but there are a lot of differences between plants and animals.

9.Animals need boron and silicon, but ocean algae may not.

10.Just six elements—carbon, hydrogen, oxygen, calcium, and phosphorus—make up almost 99% of the mass of a human body.

V. Retell the text

SSW 8

Grammar: Complex Object

Subject + Predicate + Complex Object (Noun/Pronoun + Infinitive)

The combination of a noun in the common case or a pronoun in the objective case and an infinitive used after the predicate forms a complex object. The relation between the noun (pronoun) and the infinitive is that of subject and predicate.

· I saw the boy raise his hand.

· I heard him call my name.

· I want you to know that it doesn't matter.

The infinitive may be used as a part of a complex object after the following verbs:

1. to hear, to see, to watch, to feel, to let, to make. After these verbs the infinitive has no particle 'to'.

Patterns. Read and memorize!

1. I heard him describe his new bedroom suite.

2. He makes his children go to bed early.

3. I saw him whitewash the fence.

2. to want, to expect, to know, to suppose, to consider, to believe. After these verbs the particle 'to' is used before the infinitive.

Patterns. Read and memorize!

1. He wanted me to help him choose a new computer.

2. I consider Bill to be Jack of all trades.

3. I expected him to paint the walls green.

Complex Object is a construction consists of noun in a common case or pronoun in an objective case and infinitive or gerund

Remember: pronouns in object case I- me ,he- him, it-it, they – them, you- you, she- her ,we- us

F.e: I want my granny to take me to the circus.

They expected him to be caught by the police.

We noticed the woman enter the house through the back door

We use Infinitive with particle to in Complex Object