Trắc nghiệm: Recently. the island of Hawaii (A) had been (B) the subject of intensive research (C) on the occurrence (D) of earthquakes. | Gửi trắc nghiệm |
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Trắc nghiệm: Recently. the island of Hawaii (A) had been (B) the subject of intensive research (C) on the occurrence (D) of earthquakes. | Gửi trắc nghiệm |