شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 14154

We speak Farsi at home so that the boys don’t lose touch with their language and ……… .

Nobody knows exactly why the giant animals called dinosaurs died out. Most scientists think that its reason, most …, is the sharp decrease in the temperature of the earth.

From the passage, we understand that the light that is absorbed is … . 

China is the country .......... paper, silk and gunpowder were first produced in.

The word laboratory means … .