was away in Paris for over a weekWhen she gothome,there was a pile of mails for her

7、Every possible means ______ to prevent the air pollution, but the sky is still not clear.

Many of them turned a deaf ear to her advice, _______ they knew it to be valuable

Though sending text messages or writing micro-blogs allows us to exchange thoughts, bits and pieces of online connection can’t ______ for a “real conversation”.

There is a new problem involved in the popularity of private cars ____________ road conditions need ____________.