"I've bought a ring," he said to his girlfriend.
A. He said his girlfriend that he had bought a ring.
B. He said his girlfriend that he bought a ring.
C. He told his girlfriend that he had bought a ring.
D. He told his girlfriend that he bought a ring.
Đáp án đúng là: C
Viết lại câu sử dụng bằng cách chuyển từ câu trực tiếp sang gián tiếp
Dịch: "Anh đã mua một chiếc nhẫn," anh nói với bạn gái của mình.
C. Anh ấy nói với bạn gái rằng anh ấy đã mua một chiếc nhẫn.
Trees should be planted everywhere possible. Trees absorb carbon dioxide, a greenhouse gas.
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Biodiversity has its own economic importance. Protection of biodiversity is important.