Phân biệt ba thì quá khứ trong tiếng Anh

“I was very late. When I arrived, the conference _____”, bạn sẽ chọn “started”, “was already starting” hay “had already started” để điền vào chỗ trống?

Ảnh: Shutterstock

Ảnh: Shutterstock

Theo Test English

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