Englishfor English speakers
cooperation
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noun
joint operation or action
their cooperation with us was essential for the success of our mission
—
noun
the practice of cooperating
economic cooperation
they agreed on a policy of cooperation
test
Noun
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A test is writing that many learners do in a room at the same time so that people are able to see how much knowledge the learners have.
I'm happy because I got a high mark on the test.
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A test is something someone does to see if something works.
The person did a good test of the machine by pushing all the buttons and watching the machine.
test
Verb
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The action of testing; to try something out to see whether it works.
He tested the software many times.