شرکت در آزمون آنلاین زبان انگلیسی 1 - درس2 | آزمون شماره 337

A special building from which scientists watch the moon, stars, weather etc. is called ......... .

I don't know why you always come to see me at ......... possible moment. Can't you call before coming?

My friend has a ……… table in his living room.

In those days they used to ……… the mail on horseback.

Scientists are still searching for ............... of life on other planets in the space.