题目

完形填空（共10小题，每小题2分，满分20分） 阅读下面短文，掌握其大意，然后从21~30各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。 When television first began to expand, very few of the people who had become famous as   21  announcers were able to be equally effective on television. Some of the difficulties they experienced when they were trying to   22  themselves to the new medium were technical. When   23   on radio, for example, they had become   24   to seeing on behalf of the listene1948年秋，山东农民唐和恩率领他的支前小车队，冒风雪，忍饥寒，跋山涉水，日夜奔行。他还用心地在随身携带的竹棍上刻下了他支前经过的每一个地方（见下图）。据其行程路线判断，他参加了 [     ]A．辽沈战役B．平津战役C．淮海战役D．渡江战役