شرکت در آزمون آنلاین زبان انگلیسی 1 - درس 1 | آزمون شماره 5525

The researchers ......... that corona vaccine could be available in about next two months, in September.

When you come out of the lift‚ you’ll see two doors .............................. red one and .............................. blue one. My door is .............................. red one .