The penguin is one of many flightless birds. Their   (29)   -like shape helps themswim extremely fast. Gentoos, the fastest penguins, can reach speeds of over 30kilometers per hour.   (30)   other birds have light, hollow bones suitable for flying,penguins’ bones are solid, which allows them to dive with ease. Emperor penguins   (31)   dive between 100 and 200 meters below the water’s surface. Additionally,penguins produce an oil that they spread on their feathers   (32)   them waterproof.Doing so keeps the birds warm in the icy seas.   (33)   , then, that penguins spend upto 80 percent of their time in the water! Sadly, penguins seem to be losing the battle   (34)   climate change and are becoming increasingly   (35)   as our world growswarmer. Let us hope that we can take action in time to save these remarkable creatures.
【題組】29.
(A) app
(B) identity
(C) bullet
(D) scientist