31. The__talks between China and the United States were the base of the later agreement.
A. original B. Primary C. initial D. Primitive
32.It is obvious that the sports games are no longer amateur affairs; they have become
A. laid off B. laid out C. put off D. put out
33.Research shows heavy coffee drinking is _____ a small increase in blood pressure, but not enough to increase the risk for high blood pressure.
A. compared with B. associated with C. attributed to D. referred to
34. What is happening is a survival-of-the-fittest struggle affecting______smaller factories in relatively low-tech, labor-intensive industries.
A. primarily B. rationally C. primitively D. respectively
35. At last john Smith chose to step down as the company's chief executive and return to his roots in software research.
A. resign B. remove C. retire D. replace