англ колок 6

The student will have two tests____ next week (-)

New carbon fiber may be used___( in aviation to reinforce aircraft fuselages)

He passed his exam in anatomy___ last week ( -)

Carbon dioxide is____( the main component of the Earth atmosphere)

All organic substances contain___( carbon)

The students described the___ reaction between iron and oxygen(chemical)

The patient had the symptoms of carbon monoxide___(poisoning)

Biochemistry studies chemical reactions in___ cells (living)

____ graphite, diamond is transparent and ultrahard ( Unlike)

A chemical reaction between ___ and other substances is called oxidation ( oxygen)

Carbon monoxide is ___( a gas without color and smell)

This substance is highly___ for human beings ( poisonous)

The students studied the ___ of proteins last week ( properties)

Carbon is chemically very active and forms ___ (more than a billion compounds)

____ is a substance that supplies body with energy ( Carbohydrate)

Don’t disturb me. I___ for my exam in chemistry ( am preparing)

Carbon occurs naturally___( both as a simple substance and in compounds)

Don’t worry. We___ the doctor (have already called)

The two solid forms of carbon( graphite and diamond) differ____( in their physical properties)

John___ yet where to go on summer vacation ( hasn’t decided)

Carbon, the sixth element in the Periodic Table, has___( ubiquitous properties)

I___ Ann at the university yesterday. She was preparing for her exam in anatomy (saw)

These people are speaking French. I__ them ( don’t understand)

We ___ practical classes in chemistry twice a week ( have)

The basic___ of the living cell are the membrane, the nucleus, the cytoplasm ( components)

This ___ is very interesting ( phenomenon)

Fruit __ a lot of vitamins ( contain)

DNA and RNA are___ acids ( nucleic)

Some carbon-based___ are solids in rocks ( compounds)

She __ to a fitness center twice a week ( goes)

I __ this drug every day (take)

He wants to become a research ___ (chemist)

It s half past nine. The lecture__ half an hour ago ( began)

I ___ such experiments before ( have never done)

It s half past nine. The lecture___ ( has already begun)

We bought these drugs at the nearest__ shop. ( chemist s)

Helen had a high temperature yesterday and___ the doctor ( called)

Sue___ classes last month, she was ill ( didn’t attend)

Carbon monoxide is formed when a fuel burns___( without enough oxygen available)

Where are the children? –They ___ football at the sports ground ( are playing)

Carbon monoxide is a___ gas without smell ( colorless)

We __ out experiments yet ( haven’t finished)

Let s go for a walk. It___ not ( isn’t raining)

Normally oxygen passes through the lungs and enters___ the bloodstream (in)

The symptoms of carbon monoxide poisoning are___ ( headache, fatigue and nausea)

Look at speedometer! You___ too fast ( are driving)

Can you hear the music? Jane ___ the piano ( is playing)

Most carbon-based compounds are___ ( components of living cells)

We are preparing ___ our English test ( to)

Have you passed all the exams? –Yes, I ___ the last exam yesterday ( passed)