آزمون آنلاین انگلیسی 3 - درس دوم | آزمون شماره 10349

Jack put the bullet under a microscope, ......... it 1000 times and going over the surface nanometer by nanometer.

The store ..................... the new phone was being sold had a huge line of people outside it.

Peter is a bilingual , ........................ was promoted to the manager level , because he can communicate with more people.

.   Young scientist is working at an astrophysical observatory doing research into the .................. of the universe