非谓语动词
1、The World Trade Organization (WTO) finally opened its door to China on November 10, ______ our Chinese 15-year wait.
A. to end B. ended
C. ending D. ends
选C。本题考查非谓语动词的区别与用法。v-ing形式在句中表示结果时，多指“顺理成章的”或“意料之内的”结果。
2、 ___________ a fine day, Shenzhou VI will be launched on time according to its planned time.
A. Being B. It being C. To be D. It is（注意非谓语动词与独立主格的区别）
选B。 本题考查独立主格结构。前一分句和后一分句在逻辑上存在因果关系，可以排除答案D。因为前面的分词的逻辑主语不可能是后面一个分句的逻辑主语，故前一分句要有一个逻辑主语it表示天气。
3、Thank you for the trouble me with the work.
A. having; helping B. taking; helping
C. taking; to help D. having; to help
选C。take the trouble to do意思是“不辞辛苦地做”。