BEARS The bear can be a dangerous animal, The adult bear is very strong and it can kill a person. Bears are good at 【C1】_____

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问题                                    BEARS
   The bear can be a dangerous animal, The adult bear is very strong and it can kill a person. Bears are good at 【C1】______  trees and they can run very fast, But they cannot see well and, 【C2】______  most animals, they find food by using 【C3】______  noses.
   There are seven kinds of bear. The 【C4】______  is the white polar bear, which is almost three metres tall, There are two kinds of black bear,
    【C5】______  lives in the forests of North America, and the other lives in South-East Asia. But not 【C6】______  black bears are black, They may be dark brown or a reddish brown.
   Everyone loves the black and white panda bear, which comes from China. Not 【C7】______  pandas live in the forest today because 【C8】______   is difficult to find food.
【C1】______

选项 A、climbed
B、climb
C、climbing

答案C

解析 to be good at 表示“擅长于”,at 是介词,后面应跟名词,动名词或代词。
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