... The Simpson desert remained a until Madigan made an aerial survey in 192 9.A.region B.story C.matter D.mystery14. In 193 9, Madigan led a scientific acorss the sand dune on a northely route.A.expedition ... cũng có thể có hai cấu trúc sau:Ex: Ram went swimming although it was raining. Although it was raining, Ram went swimming. Các liên từ phụ thuộc thường dùng: therefore, however, Although, ... as it is advertised. 19. He went to the store. He did not buy anything, 20. We thought the figures were correct. , we have now discovered some errors.4PRACTICE TEST 9 A. PHONETICS AND VOCABULARYI....