Although sports（ ）the household, Joe drew the line when they interfered with family traditions and routine.
China covers vast territories, and is（ ）in natural resources.
The students take a（ ）test in March, and the main exam is in July.
I didn’t know what to do but then an idea suddenly occurred （ ） me.
1.中国是世界上的发明大国，但是很多发明无法走出实验室，归根结底是资金问题。2.当然我们还应该充分意识到，大熊猫生存的主要威胁不是来自于大熊猫的繁殖能力，而是来自于人类对大熊猫自然生态环境的破坏。3.他饮他的花酒，我喝我的清茶。人生需要一种境界：自我安定。4.自幼来自农村且深受“谁知盘中餐，粒粒皆辛苦”陶冶的我，是断然不肯将能吃的剩菜倒掉的。5.太多的医学和研究生教育把学生禁闭在黑暗的房间里，使他们成为被强迫灌输信息的笨人。
because（ ）.
'>Amtrak（美国铁路客运公司）was experiencing a downswing in ridership（客运量）along the lines comprising its rail system. Of major concern to Amtrak and its advertising agency DDB Needham, were the long-distance western routes where ridership had been declining significantly. At one time, trains were the only practical way to cross the vast areas of the west. Trains were fast, very luxurious, and quite convenient compared to other forms of transportation existing at the time. However, times change and the automobile became America's standard of convenience. Also, air travel had easily established itself as the fastest method of traveling great distances. Therefore, the task for DDB Needham was to encourage consumers to consider other aspects of train travel in order to change their attitudes and increase the likelihood that trains would be considered for travel in the west.Two portions of the total market were targeted: 1）anxious fliers—those concerned with safety, relaxation, and cleanliness and 2）travel-lovers—those viewing themselves as relaxed, casual, and interested in the travel experience as part of their vacation. The agency then developed a campaign that focused on travel experiences such as freedom, escape, relaxation, and enjoyment of the great western outdoors. It stressed experiences gained by using the trains and portrayed western train trips as wonderful adventures.Advertisements showed pictures of the beautiful scenery that could be enjoyed along some of the more famous western routes and emphasized the romantic names of some of these trains (Empire Builder, etc. ) These ads were strategically placed among family-oriented TV shows and programs involving nature and America in order to most effectively reach target audiences. Results were impressive. The Empire Builder, which was focused on in one ad, enjoyed a 15 percent increase in profits on its Chicago to Seattle route.1.What's the authors purpose in writing this passage?2.It can be inferred from the passage that the drop in Amtrak ridership was due to the fact that（ ）.3.To encourage consumers to travel by train, DDB Needham emphasized（ ）.4.The train ads were placed among family-oriented TV pr