A. replacement
D
Replacement (n): sự thay thế Change (n): sự thay đổi
Exchange (n): sự trao đổi Automation (n): sự tự động hóa
Dựa vào thông tin vế trước “…have replaced machine operators with computers”, ta chọn “automatic” để phù hợp với ngữ cảnh
The author argues that there is more diversity of life in the sea than in the rain forests because
The (26) ________ group will appreciate the recent study, as a hunter is more likely to require such speed.
It could run 100 metres in a little over six seconds, which would beat modern Olympic (28) ________ more than a third of the track behind.