John is one of the best writers who ______ published a lot of books.

Rose ____________ English since 2002. She’s got a lot of teaching experience.

Iprefer a street in a small town _____one in such a large city as Shanghai.

I was chatting on the Internet last nightwhen I smelt somethingin the next room

The spokesman of the government has announced that the UFO approaching the city has been _____ identified as being a satellite[ ]