题目

阅读下面短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。 We arrived in Spain for the first time a few weeks ago. I decided to   1   a car because we had sold the one we had in England before   2   home. Yesterday the sales office rang us to say the car was   3    I had tried out a model like it before, but as I was not yet   4   driving in this city, my wife did not want me to collect it   5   so we went together to   6   it. We paid for the car and   7   the papers. They told us that there was  8   p如图，A，B，C，D四点在⊙O上，AD，BC的延长线相交于点E，直径AD=10，OE=13，且∠EDC=∠ABC．（1）求证：；（2）计算CE•BE的值；（3）探究：BE的取值范围．