5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 30

An electrical fault could have caused the fire. a. An electrical fault could have been

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An electrical fault could have caused the fire.

An electrical fault could have been caused by the fire.

An electrical fault could have caused the fire

The fire could have been caused by a electrical fault.

The fire could have caused an electrical fault.

Giải thích

Chọn đáp án C