He was very __________ of my safety.
China’s labor supply will continue to rise,despite the fact that the workingage population________.
Energy, passion and a burning desire are, you see, ________ true learning takes.
—Where did you come across our Chinese teacher?—It was in the supermarket ________ I purchased mooncakes.
With Father’s Day around the corner ,I have taken some money out of the bank ______ presents for my dad.
The idea of traveling abroad really a lot of Chinese people. That’s why every year witnesses more people applying for passports.