21. ________ is better than cure, and medication should consider the needs of individuals.
A. Protection B. Prevention C. Prediction D. Promotion
22. The Japanese government stubbornly claimed the ownership of DiaoYu Islands belonging to China, ________ greatly hurt the friendship between the two peoples.
A. that B. it C. this D. which
23. Much to my surprise, I found the education system in the UK was totally different from ________ of my home country.
A. that B. one C. it D. what
