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Câu hỏi:
Most oxygen atoms have eight neutrons, but a small amount have nine or ten.
- A. Most
- B. have
- C. amount
- D. or ten
Lời giải tham khảo:
Đáp án đúng: C
Kiến thức: Lượng từ
Giải thích:
an amount of + danh từ không đếm được và động từ chia theo S số ít
a number of + danh từ đếm được và động từ chia theo S số nhiều
“oxygen atoms” (nguyên tử oxy) là danh từ đếm được dạng số nhiều.
Sửa: amount => number
Tạm dịch: Hầu hết các nguyên tử oxy có tám neutron, nhưng một số lượng nhỏ (các nguyên tử này) có chín hoặc mười (neutron).
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