So convenient ______ to pay by credit card that more and more people apply for their credit cards. [ ]

Neither of the novels which popular with us been translated into Chinese. [ ]

The reason why this kind of machine is popular with users is that it will work in ______ temperature.

How did you get the MP4, from a shop or by phone? —-________. I always like shopping online.

Our classroom is a little untidy. Please the desks and chairs.