Science and technology is changing fast nowadays. I bought this MP3 player at the beginning of this year but now it's out of________.
The comments which he made ______ marketing bothered his boss greatly.
He told me the news______, believe it or not, he had earned $1 000 in a single day.
--- The final score of the basketball match was 93—94. --- So we were only ______ beaten.
It is so difficult a problem that ____ student in this class ____ work it out.
The water company appealed ______ everyone ______ the amount of water used.