.( 辽宁卷22). There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.
| A．the; the | B．不填; the | C．the; 不填 | D．a; the |
（届北京市东城区普通校高三3月联考英语试卷）
Don’t be afraid of asking for help ___________ it is needed.
| A．unless | B．since | C．when | D．although |
（届重庆市南开中学高三二诊模拟英语试卷）
Parents are advised to put books __________ they are easily accessible to children .
| A．which | B．where | C．in which | D．who |
（届安徽省马鞍山市高三第一次教学质量检测英语试卷）
Trust is needed in the whole society, which requires parents to obey their own rules and set a good example _______ children can trust them.
| A．soon after | B．as if | C．in case | D．so that |
（届江西省师大附中鹰潭一中宜春中学等重点中学高三联考英语试卷）
—What should we pay more attention to if we go camping in the mountains?
—Nothing special. Take a special pair of glasses _______ the wind there is strong and cold.
| A．even if | B．in case | C．providing that | D．so long as |
（届江苏省扬州中学高三4月阶段测试英语试卷）
________, Mr. Wells is scarcely in sympathy with the working class.
| A．Although he is a socialist | B．Even if he is a socialist |
| C．Being a socialist | D．Since he is a socialist |