Cars play an important role in modem life, but they also cause many problems like air pollution.

I’d like to borrow a book. Its name is “Travelaround the world”. — Let me check on the computer first. Oh,it ______ that Kate has got it.

I _________ an old photo while tidying my study, which reminded me of my happy childhood

The most frightening words in English languages, as it is, are “Out computer is ______________”

That ________ a good idea.