填空题 It is understandable that the health and welfare of their family is a(n) ______ concern for this young couple.

填空题 The doctors are at a loss because so far no medicine has been found to ______ the spread of the disease.

填空题 My advice to Mr. Stewart is to think carefully before entering into a career in medicine, as this is a field which requires a lot of ______ and long working hours.

填空题 Darwin’s thinking both drew upon and ______ the conventional ideas of his time.

填空题 He knows that the ______ of social status can consume vast amounts of his time and effort.

填空题 We see many special education directors trying to ______ the quality of their programs with much less money and much smaller staff.

填空题 Most cities in the country have introduced “Clean Air Zones” ______ factories and households are only allowed to burn smokeless fuel.

填空题 People there are told it is their ______ duty to support the national economy by buying their own products.

填空题 In spite of all your ______, there may be times when you encounter difficulties in the training process.