شرکت در آزمون آنلاین زبان انگلیسی 1 - درس 4 | آزمون شماره 1230

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I think that sign means "we ..................... enter the building" . Look, there's a security guard too.

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The number of ............................. flights has dramatically decreased due to the epidemic of corona virus.

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. He arrived..........the park two hours before the game