题目

如图AB⊥BC，CD⊥BC，AB=DC则(1)∠ABD=_____(2)证明(1)中的结论。 答案：∠ABD=∠ACD 证△ABC≌△DCB(HL) 再根据等角的余角相等得出结论What ______ had Bob walked farther, as far as the river bank?A．would happenB．could happenC．would have happened D．needn’t have happened