The boss （）(应该知道不应该) try the best of his employees by threatening.

A. He is one of the most important executives of the firm.
B. His post is likely to disappear when new technologies have been introduced.
C. He has no say in making important decisions of the firm.
D. He is directly under the chief financial executive.

A. not all the countries are willing to make deep cuts in emissions
B. the leaders of many countries are reluctant to reach an agreement
C. people in many areas don’t realize the seriousness of the problem
D. world technology is not able to solve the problem