I’ll never forget the days ______ we spent together in the country.

After graduation she reached a point in her career __________ she had to decide what to do.

difficult, I ________ him find ajob, which made him very pleased.

One theory, ________ suggested by Harvard University, is that humans began cooking their food, thereby releasing nutrients locked in the raw food and reducing the time needed to chew it.

My sister ____a good chance to go abroad for further study of English