51. ________, they pick up fragments of rock which become frozen into the base of the ice.
A. Glaciers move
B. Glaciers moving
C. They were glaciers
D. As glaciers move

Pada soal ini membutuhkan conjunction subjek dan main verb.
Ambil opsi D. conjunction (As) subjek (glaciers) main verb (move).

52. The tape measure first evolved from ________ used by the Egyptians.
A. the chains measure
B. the chains are measured
C. the chains are measuring
D. the measuring chains

Pada soal ini membutuhkan struktur word order (artikel adjective noun).
Ambil opsi D. artikel (the) adjective (measuring) noun (chains).

53. A typical Atlantic hurricane starts as a low pressure system near ________.
A. Africa coasts
B. coast to Africa
C. the African coast
D. Africa has a coast

Pada soal ini membutuhkan struktur word order (artikel Adjective noun).
Ambil opsi C. artikel (the) adjective (African) noun (coast).

54. It is not clear whether the subdivisions of the neocortex ________ units.
A. individual
B. are individual
C. they are individual
D. individually

Pada soal ini membutuhkan main verb jamak sesudah subjek jamak (subdivisions). dan butuh adjective.
Ambil opsi B. main verb jamak (are) adjective (individual).

55. The job________ started yesterday was rather difficult.
A. when
B. was
C. after
D. that he

Pada soal ini membutuhkan conjunction dan subjek.
Ambil opsi D. conjunction (that) subjek (he).

56. ________ just dropped off a package for you is my sister.
A. The woman
B. The woman who
C. Because the woman
D. With the woman

Pada soal ini membutuhkan subjek dan conjunction.
Ambil opsi B. subjek (The woman) conjunction (who)

57. Modern humans, who first appeared about 600,000 years ago, ________ Homo sapiens.
A. calling
B. were called
C. they called
D. they were called

Pada soal ini membutuhkan main verb.
Ambil opsi B. main verb (were called).
S + was / were + V3 (past simple pasif positif).

58. The first writing ________ evidence of is on Mesopotamian clay tablets.
A. we
B. that we
C. has
D. that we have

Pada soal ini membutuhkan conjunction subjek dan main verb.
Ambil opsi D. conjunction (that) subjek (we) main verb (have).

59. ________ drought-resistant plants which store water in fleshy tissue.
A. Succulents are
B. Succulents
C. They are succulents
D. Succulents which are

Pada soal ini membutuhkan subjek dan main verb.
Ambil opsi A. subjek (Succulents) main verb (are).

60. Benjamin Kabelsky, whom________ as Jack Benny, was a famous comedian in vaudeville and on radio and television.
A. most people’s knowledge
B. most people know
C. knowing most people
D. the knowledge of most people

Pada soal ini membutuhkan subjek dan main verb.
Ambil opsi B. subjek (most people) main verb (know).