He was a stubborn person. ________, we could not persuade him to change his mind.

(2013·哈尔滨四校高三统一检测)In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.

The photo reminds him _______ his old grandma

_______hissister.

a gap year is a good chance for students to learn skills and gain life experience, ______ them an edge in the job market.