Englishfor English speakers
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
variety
Noun
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A variety of things is a group of things that are not all the same.
Americans can buy a wide variety of cheap products at local supermarkets.
This study was conducted over a relatively long period of time and in a variety of settings.
The films cover a wide variety of topics from wars to fantasy.
The teachers use a variety of techniques to help the students understand the material.
We get the information from newspapers and a variety of other sources.
They felt it was important for a variety of reasons.
The shirts are available in a variety of fun colors.
Middle school students participated in a wide variety of activities.
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Variety is the quality of not being the same.
Fruit can add variety to your salads.
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A variety is one kind of something, especially plants and animals.
The shop has 25 tomato varieties.
By 1930, Southerners alone had developed nearly 1,400 unique apple varieties.
of
Preposition
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Made using.
It is a house of cards.
human
Adjective
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Human rights, life, nature, etc. belong or relate to people, not machines or animals.
Every person has human rights.
My dog doesn't like dog food, he likes to eat human food, such as meat, like us.
human
Noun
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A human is a person; a member of the Homo sapiens species.
What effect are we humans having on the natural world?
disease
Noun
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If a person, animal, or plant is ill, it has a disease.
1.4 million children suffer from heart disease in Pakistan.
There are many different germs which cause diseases.
disease
Verb
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To cause unease; to annoy, irritate.
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To infect with a disease.