—Don't always turn to particular patterns time after time in our life.—I agree. We would otherwise________our thinking by rules or common attitude.

What will people die of in 100 years? If you think that is a simple question, you ______ attention to the revolution taking place in biotechnology.

More than a dozen students in that school ________ abroad for further study every year.

— Look! How long _____ like this?　  — Three weeks! It’s usual here that rain _____ without stopping these days of the year.

 I know he _________ here ten years ago  .