Directions: This part consists of ten sentences. Each sentence has four parts underlined and labeled A, B, C and D. Identify the one choice that is not accepted in standard English and mark your choice by blackening the corresponding letter on the Answer Sheet.
21. A few [A] naturally elements exist in such small [B] amounts that they are known [C] mainly from laboratory-made [D] samples.
22. [A] To stay warm in cold weather, cold-blooded animals must expose [B] itself to [C] a source of warmth such as [D] direct sunlight.
23. A severe illness [A] where she was [B] just nineteen months old [C] deprived Helen Keller [D] of both her sight and hearing.
24. In [A] the wild, tea plants become [B] trees of [C] approximately thirty feet in [D]high.
25. For many centuries, sailors [A] relied on echoes [B] to warn them of [C]another ships, icebergs, or cliffs in [D] foggy weather.
26. [A] It is the [B] interaction between people, rather than the events that occur in their lives, [C] that are the main focus of [D] social psychology.
27. It is true that [A] the rotation of the Earth [B] on its axis is responsible [C] with the alternation of periods [D] of light and darkness.
28. One of the most difficult [A] questions [B] in defining sleep [C] is “What [D] is the functions of sleep?”
29. Seven [A] of planets rotate in the same direction [B] as their orbital motions, [C] while Venus and Uranus rotate in the [D] opposite direction.
30. The tongue is [A] capable of many [B] motions and configurations and plays [C] a vital role in chewing, [D] swallowed, and speaking.
