Test # 50
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760 questions in 76 tests. Each test contains 10 questions.
Idiom of the Day
stick by/with (someone or something)
to support someone or something
The woman always sticks by her friends when they are in trouble.
I stuck with my friend during his troubles.
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Amazing Facts About Your Heart
In 1929, German surgeon Werner Forssmann examined the inside of his own heart by threading a catheter into his arm vein. This was the first cardiac catheterization, a now common procedure.