پرسش‌ها با تگ (گرامر زبان انگلیسی)

__________ the traffic was extremely heavy, they managed to arrive at the airport on time for their flight. A) As if B) Even though C) As though D) In case

سلام و درود برشما همراهان گرامی Mona Lisa..........by Leonardo da Vinci as far as I............ A- was painted/ know B- has been painted/ am known  C- was painted/ am knowing  D- has been painted/ am know

The discovery of the halftone process in photography in 1881 made it ……… 

Although Margaret Mead had several assistants during her long investigations of  Samoa, the bulk of the research was done by ……… alone.