شرکت در آزمون آنلاین
زبان انگلیسی 2
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واژگان (Vocabulary)
| آزمون شماره 6347
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3- While sleep requirements ………. slightly from person to person, most healthy adults need between 7 to 9 hours of sleep per night to function at their best.
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Did you know that children , below ۱۵ years of age , make up a large proportion of the world's ........................ ?
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