题目

Taiwanese fishing boats that sailed to theDiaoyu Islands to protest Japan's purchase of part of the islands completed their voyage Tuesday morning and have set sail for home. Local media reported that the boats finished their protest at 9:15 a.m. and are expected to return to a port in northeast Taiwan's Yilan county at noon Wednesday. Although the boats originally numbered 75，they were joined at sea by other boats from different parts of Taiwan, raising the total number to about 100 vessels. Organizers said the voyage was made to protect Taiwanese fishing rights in nearby waters and to  He went to Beijing at the end of September, _________ there was a grand celebration for new China’s 60th birthday on National Day. A. when                        B. which                      C. where                      D. that