شرکت در آزمون آنلاین انگلیسی 3 - انگلیسی 3 | آزمون شماره 11867

The boss told the workers what he wanted done, but let them ......... how best to do it.

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

It is crystal clear; if we went on singing loudly in such a careless way we were doing then, I’m sure that our neighbors, particularly those living in the next door, … happy.

The middle-aged guest … with anger as she left the five-star hotel.