Điền 1 từ vào chỗ trống
WHALING
Rock carving suggest that Stone Age people were hunting whales for food as early as 2200 B.C. Such(1).....................hunting is still practiced today in a number of (2)........................... including the Inuit people of Greenland and North America. Whaling became big business from the seventh century as the(3)............................for whalebone and whale oil rose, and humpback and sperm whales were hunted in (4)............................. large numbers.But just as stocks of these species began to fall, the explosive harpoon-gun was(5).......................This weapon, togerther with the development of steam-power ships,(6)................. the whalers to hunt the fast-moving fin and blue.
