The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
The doctor is skilled at treating heart trouble and never accepts any gift from his patients, so he has a very good __________.
_________ he met with the difficulty did he realize the importance of our help.
Eating too much fat can __________ to heart disease and high blood pressure.
Due to the unreasonable individual income __________,the gap between the rich and poor has become an outstanding issue.
He contributed an article __________ China Daily.