__________ medical science has achieved control over several dangerous diseases, what worries us is that some of them are returning.
Nancy, ____ for about half a year to apply for a job as an airline hostess, finally took a position at a shopping center.
Hot_______thenightairwas,wesleptdeeplybecauseweweresotiredafterthelongjourney.
----Putting on a happy face not only helps to make friends, but also makes us feel better. ----_________________.
When we saw the roadwith snow, we decided to spend the holiday at home.
—Has Tom finished his task yet? —I’m not sure. But he _____ on it last week