In the farmyards, the chickens and even the pigs were too _________ to eat.

My secretary told me just now that she ________ typing the letters by the time I went back, which I do have some doubt about. You know, she is not that efficient a girl.

To achieve a bright future,we should _____study hard _____keep in good health.—I agree with you.

The number of people present at the meeting ______ about one thousand, a large number of whom ______ experts from abroad.

Most people find it hard to ________Beijing Opera toforeigners because of cultural differences.