.The development of industry has been________gradual process throughout________human existence,from stone tools to modern technology. (2012·浙江,2)
Mary as well as her elder sister who______ Chinese at university ______ gone to China for holiday.
If you have a job, _______yourself to it and finally you will succeed. A don't devote B.do devote C. devoting D. not devoted
My grandparents asked me to go and see them whenever______.
______some people dislike may be others’ favorite.
Studies show that office workers are more ______to suffer from backache because they always sit before computer screens for long hours.