daily calories（卡路里） to heat its body to get rid of the water,” Hu said. “Every time they got wet they would get hypothermia（体温过低）and die.”
The bigger the animal, the slower it shakes, according to Dickerson and his team. A mouse moves its body back and forth 27 times per second, but
a bear shakes only four times per second.
Animals’ skin also helps them get rid of water. The scientists are continuing to look at how animals interact with water in the natural world. In particular, the scientists want to know how water interacts with hair —which means studying animals that have got used to life in water, like beavers and otters.
28.What can we learn from the 2nd and 3rd paragraphs?
A.Professor David Hu led the study.
B.Animals shake off water to keep themselves cool.
C.Videos of 40 species of animals were recorded in the study.
D.Dogs shake off water more quickly than washing machines.
29.How did David Hu feel about the video?
A.Surprised.
B. Encouraged.
C. Excited.
D. Amused.
30.What does the passage mainly talk about?
A.The recorded videos of forty different animals.
B.The movement of animals in the water.
C.The importance of water for animals.
D.The frequency of animals’ shaking water.
第二节（共5小题，每小题2分，满分10 分）
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Aware of your time wasters? Ready to stop one TV series after another? - 8 -