_____, mostly known as vitamin B1, is essential for the proper function of our heart, nerves and muscles.

_____ used to be called vitamin B4, even though it is not considered a true vitamin.

The ____ in my grandma's way of thinking allowed her to solve practical problems easily.

Some argue that the _____ of the public sector poses many practical difficulties to a country's citizens on a daily basis.

The machine _____ automatically when it's not used for more than fifteen minutes.

Mikis Theodorakis' _____ contribution to a music is well known and respected.

Some ____ got in Dorothy's fingers as she was trying to clean the broken glass from the floor.

Athens in mid-August _____ an abandoned city.

Pose bushes should be _____ every February so as to flower again in May.

Michael had all the qualifications to land a good job; his only _____ was his inexperience.

Not being able to save his company was _______ Mark's ____.

Paul lent his best friend 100$, ____.

My grandfather wasn't particularly liked, mainly because he used to ____.

A great number of small or family business have _____- due to the economic crisis.

Gregory ____ when he saw his son crashing his new car into their fence.

When schools start in September, children need some time to ______ after their summer holidays.

We never made it to Jason's party, as we _____ and wrote down another date for his party.

The invention of tablets was an ____ in the field of communications technology.

Stella seemed to ______ just a few meters before the finishing line. She only managed to get second place.

Lee __________ when he told me that another person was hired for the position I had applied for.

No medicine comes without any _____ so they should be taken with caution.

______, a chemical element, is used in medicine, in cancer treatment.

The government's decision to ______ the local authorities made many employees redundant.

The two countries engaged in _____ negotiations prior to reaching an economic agreement.

Dolphins can _____ sounds that humans cannot.

The scientists used _____ glasses to observe the life of nocturnal animals.

During the next couple of days, there is going to be a slight _____ in the temperature.

As the car had no brakes and was traveling at 180kph, its ____ with the tree was catastrophic for both.

When we address people we do not know welol, we should use formal ____.

I'll always remember my grandma's _____ smile whenever she saw us.