29. The director gave me his ________ that he would double my pay if I did my job well.

A) warrant

B) obligation

C) assurance

D) certainty

30. The Christmas tree was decorated with shining ________ such as colored lights and glass balls.

A) ornaments

B) luxuries王长喜六级算分器

C) exhibits

D) complements

31. The two most important ________ in making a cake are flour and sugar .

A) elements

B) components

C) ingredients

D) constituents

32. Cultural ________ indicates that human beings hand their languages down from one generation to another.

A) translation

B) transition

C) transmission

D) transaction

33. We must look beyond ________ and assumptions and try to discover what is missing.

A) justifications

B) illusions

C) manifestations

D) specifications

34. No one imagined that the apparently ________ businessman was really a criminal.

A) respective

B) respectable

C) respectful

D) realistic

35. If nothing is done to protect the environment, millions of spedes that are alive today will have become ________ .

A) deteriorated

B) degenerated

C) suppressed

D) extinct