We can use the expression tend to before verbs to express the idea that something happens
usually or frequently. For example, these two sentences have the same meaning:
Plant proteins tend to be deficient in amino acids.
Plant proteins are usually deficient in amino acids.
Rewrite these sentences using tend/tends to.
a) Animal protein usually contains a balanced amount of different amino acids.
Animal protein tends to contain...
b) Simple carbohydrates are usually found in fruit and milk. (Simple carbohydrates/tend to/be
found...)
c) Cheese is usually high in fats.
d) Citrus fruits are usually good sources of vitamin C.
e) Sausages usually contain saturated fats.
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