50 câu trắc nghiệm ôn thi vào 10 Tiếng Anh - Hoàn thành đoạn văn có đáp án

The lead in petrol produces a (3) _______ gas which often collects in busy streets surrounded by high buildings.

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The lead in petrol produces a (3) _______ gas which often collects in busy streets surrounded by high buildings.

dead

powerful

poisonous

harmless

Giải thích

C

poisonous (adj): độc hại