Involuntary, endorphins, hormones, cells, epinephrine.
1 When we exercise our bodies release
a chemical that
helps concentration.
2 The...
in our body
are feel good chemicals that make us feel
relaxed and happy.
Our memory and creativity depend on the
number of brain
that we have.
4. Some muscles in our bodies are called
muscles because
they function automatically.
5 The growth and strength of our muscles
can be affected by our

The Trans-Siberian Railway

The total length of the Trans-Siberian line is nearly 9,600 km. That is the world's longest railway.

The construction of the Trans-Siberian line began in 1891 and it was put into operation in 1905. However, the railway was poorly built and accidents often took place.

The reconstruction of the Trans-Siberian Railway began after 1917. Now most of the line is electrified. All freight and passenger trains are operated by powerful diesel and electric locomotives.

The Trans-Siberian Railway plays a very important part in the economic development of our country because it carries a large volume of traffic. Besides, it runs international container service between Europe and Japan.

Greater changes will take place on the Trans-Siberian Railway in the future. Faster locomotives will be put into service. Automation and efficient electronic computers will provide a safer transportation of freight and passengers.

Объяснение:

1. My father asked\wondered\... if I watched the rocket took off

2. The scientist said\stated\claimed\... (that) there were probably canals on Mars

3. She said\stated\exclaimed\... (that) there had not been a manned spacecraft launch in years

4. The engineer told\explained to\... the crew (that) they would not have power for the following hour

Объяснение:

Можете выбрать любой из глаголов написанных через слеш (\), или вставить свой аналогичный

'That' (который в скобках написан) можно писать, можно не писать, как хотите, ошибки не будет