Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
Among all the animals, dogs are the most （ ）companions for human beings. (faith)
【正确答案】：FAITHFUL
【题目解析】：
根据前文the most（最······）和后文companions（伴侣）可知空格处应填faith的形容词faithful忠实的。
句意：在所有的动物中，狗是人类最忠实的伴侣。