They made an enormous effort in wildlife conservation. A lot of species were saved

31/50

They made an enormous effort in wildlife conservation. A lot of species were saved from extinction.

Such was their effort in wildlife protection that a lot of species couldn't be saved from extinction.

Not until a lot of species had been saved from extinction did they make an enormous effort in wildlife conservation.

No matter how much effort they have made to protect wildlife a lot of species were saved from extinction.

Had it not been for their enormous effort in wildlife conservation, a lot of species wouldn't have been saved from extinction.

Giải thích

Kiến thức: Câu điều kiện

Giải thích:

Diễn tả hành động không có thật trong quá khứ ➔ câu điều kiện loại 3

Tạm dịch: Nếu không có nỗ lực to lớn của họ trong việc bảo tồn động vật hoang dã, thì rất nhiều loài đã không được cứu thoát khỏi nguy cơ tuyệt chủng.

Choose D.