Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Câu 1: Weather (A) and geographical (B) conditions may determine the type of (C) transportation using in (D) a region.
A. Weather
B. geographical
C. the type of
D. using in
Câu 2: Commercial airliners do not fly in the vicinity (A) of volcanic eruptions because even a small amount (B) of volcanic ash (C) can damage its (D) engines.
A. in the vicinity
B. amount
C. ash
D. its
A.
B.
C.
D.