All the characteristics that distinguish birds ________ other animals can be traced to prehistoric times..
I climbed the stairs slowly with a big suitcase, my fatherwith two more.
The country’s populationsmall, and most of its populationin the mountainous areas.
Contemporary English is quite different from Old English. There has never been a year____the language was not changing.
To help a friend solve the problem troubling him,.
Not until all the fish died in the riverhow specious the pollution was.