شرکت در آزمون آنلاین
زبان انگلیسی 1
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زبان انگلیسی 1
| آزمون شماره 12970
A/An ………. is a building especially designed for scientific study of such things as planets and stars.
Which sentence is grammatically correct?
Thanks for lending me your dictionary. I … bring it back to you as soon as possible, OK?