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Parker’s first Antarctic expedition in 2009,
took place
has taken place

when he only fourteen.
was
has been

He first to trek to the North Pole at the age of fifteen.
tried
has tried

But since that expedition, he the trek twice.
completed
has completed

In April 2010 he the first person to check in at the North Pole via Foursquare.
became
has become

He numerous talks on the issue,
gave
has given

and in August 2012 he at the prestigious TEDx conference in Belgium.
spoke
has spoken

He articles for The Huffington Post, The Independent and TheNew York Times.
wrote
has written

There is more ahead for this inspiring teenager and the world the last of Parker Liautaud yet.
hasn't heard
didn't hear

The laboratory has its own equipment. It is equipped with special

laboratory tables besides the demonstration table which stands between the two rows  of tables and in front of them. In our experiments we use laboratory vessels and glassware of different  kinds. There are three groups of them in the laboratory: glassware for general  use, glassware for special use and glassware for measuring. Students carry out experiments using test-tubes, funnels, flasks, retorts, burettes, graduated  cylinders, measuring glasses and pipettes. They also have microscopes,  analytical balances, distillators, burners to heat solutions and thermometers at hand. The most widely available reagents at our laboratory are acids, alkalis,

oxides, organic salts, indicators.

Объяснение:

1)If we leave now, we'll get there on time.  

2)You won't be strong if you don't eat vitamins.

3) If you eat too many sweets, you'll have bad teeth.

4) If it rains, we won't go to the park.

5) I'll to the shops if we need more orange juice.

6) You won't learn if don't listen.

7) He won't be bored if he has some music to listen to.

8) If I press this button, the machine will tidy my bedroom.

3. Will I get a present if I pass my exams?

Will we be healthy if we ride our bikes every day?

Will this glass break if I drop it?

Will she come if we ask her nicely?

Will they stop the football match if it rains?

Will you get off if the bus stops?

Will dad be angry if we don't tidy our bedrooms?

Объяснение: