Studies show the electronic devices people have made much use of music may be causing hearing loss in many people.
___ people gather there, talking about the film about Comrade Lei Feng.
I can't remember where I have put that book.Maybe they are ___ which one is not correct.
More than one student ___ that experiment.
The teacher together with his students ___ down at the desk and having a discussion in the classroom.
--___ you got to know my telephone number? ---Through a friend of yours.