-On hearing the sound, the birds flew away in every    .

With a good ______ of both Chinese and English,she had an advantage over the other interviewees.

Due to the widespread________ of this medical technology, more diseases can be discovered and treated at an early stage.

There is a growing______for people to work at home instead of in offices. 

Please ask the lawyer what his __________ would be to take the case to court.