شرکت در آزمون آنلاین زبان انگلیسی 2 - درس سوم | آزمون شماره 656
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A/An ............................... occurs when the bond or the stores are selling at a price less than it's real value.
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He hasn't decided yet whether ............................ the English course or the Spanish course.
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One of my friends believes that it is easy for him ............................. ten words every night .
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