问题
选择题
A major search has been_____ for a Malaysian Airlines jet with 239 people on board after it lost contact flying from Kuala Lumpur to Beijing.
A．identified
B．launched
C．substituted
D．dissolved
答案
答案：B
题目分析：考查动词。A. identified识别；B. launched开展（活动、计划等）；C. substituted替换；D. dissolved使消失。句意：在马来西亚航空公司一架载有239人的飞机从吉隆坡飞往北京失去联系之后，一场大型搜索已经展开。故B正确。