Ozone has his origin in a number of sources, a prime one being the automobile engine.
A. his
B. prime
C. being
D. the
Giải bởi Vietjack
Đáp án A
Kiến thức: Đại từ nhân xưng
Tính từ sở hữu thay thế cho danh từ “Ozone” (không phải danh từ chỉ người) là “its” nên sai ở đáp án A.
Sửa lỗi: his => its
Tạm dịch: Ozone có nguồn gốc từ một số nguồn, nguồn chính là động cơ ô tô.
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