【正确答案】 B

【答案解析】[理由] 原句实等于：
...just announced that Flight 101 which is bound for London has been cancelled...
上列句子中划线的部分为关系代词which引导的定语从句，其中bound是形容词，表“开往的”，固定用于下列结构中：
be bound for+地方 开往某地
[例] This train is bound for Shanghai.
(这班列车开往上海。)
根据上述，(B)应为正选。
(A)flew是fly(飞)的动词过去式。若将(A)置入空格中，则整句应改为：
...just announced that Flight 101 which flies to London has been cancelled....
(C)went是go的动词过去式，须与介词to连用。若将(C)置入空格中，则整句应改为：
…announced that Flight 101 which goes to London has been cancelled...
(D)arrived(至/到)是arrive的动词过去式，须与介词at或in连用。arrive at+小地点(建筑物) 抵达某地
arrive in+大地方(城市、国家)
[例] We arrived at the party on time.
(我们准时抵达派对。)
We arrived in town yesterday.
(我们昨天抵达镇上。)
*上述3项若置入空格均不合乎语法，故均不可选。