1 . The man was responsible for much of the research and ______ work that led to the understanding of the structure of DNA.

A．discovery

B．production

C．creation

D．contribution

2 . 这些物品的造就需要很多素质的结合，包括技能，对材料的尊重，对传统的奉献以及工作时的专注。（汉译英）