27. ____ of eighteenth-century Russian settlements in Alaska are found on Kodiak Island and at Sitka.
(A) For the sites
(B) The sites
(C) They are the sites
(D) There are sites

23. The body is composed of some hundred thousand million cells, ____ is complete in itself. (A) which (B) some of which (C) each of which (D) of which

24. ____, geology has been divided into two major divisions: physical geology and historical geology. (A) Despite of its broad scope (B) Because it is broad scope (C) In spite of its broad scope (D) Because of its broad scope

25. Xanthines have both good and bad effects on the body, and these effects ____ the size and regularity of dosage. (A) generally determine on (B) which are generally determined by (C) generally determined by (D) are generally determined by

26. It is the interaction between people, rather than the events that occur in their lives, ____ the main focus of social psychology. (A) which are (B) that is (C) is (D) of which are

28. ____, their small size and the thin soil make them easy prey to a hiker’s heel. (A) When alpine flowers can resist wind, cold, and snow (B) Alpine flowers can resist wind, cold, and snow (C) Alpine flowers resisting wind, cold, and snow (D) While alpine flowers can resist wind, cold, and snow

29. Other desirable qualities of concrete, the only building material that can be delivered to the job site in a pliable state, include its strength, economy, and ____. (A) the fact that it lasts a long while (B) durability (C) because it lasts a long while (D) great ability to last

30. There is new evidence to suggest that a child’s personality is ____ traumatic events. (A) developed more by everyday interactions rather than by (B) developed more by everyday interactions than by (C) developed more by everyday interactions instead by (D) being developed more by every day interactions than by

31. The work “enhance” is closest in meaning to ____. (A) use (B) improve (C) counteract (D) balance

32. The word “they” in paragraph 3 refers to ___. (A) aqualities (B) fins (C) grooves (D) depressions

33. Why does the author mention that “Airplanes retract their landing gear while in flight?” (A) To show that air resistance and water resistance work differently from each other (B) To argue that some fishes are better designed than airplanes are (C) To provide evidence that airplane engineers have studied the design of fish bodies (D) To demonstrate a similarity in design between certain fishes and airplanes