林则徐销烟池的地址:为什么选B

happen to sb.
whom在句中做happen to 的宾语.

happen to sb.是固定用法 to 后面必须接who的宾格

B. to whom

先看这个句子---This accident happened to 100 people.

那么，100 就是 the number to the people this accident happened 能理解么？

to the people this accident happened是 the number 的定语

这个to 其实 是 happened to 的 to

I don’t think the number of people __ this happens
is very large.
A. whom B. to whom C. to which D. which
本题实际上是选择the people后面的定语从句this happens的引导词。

如果选A，则句子成为the people whom this happens,句子原型就是：this happens the people.由于happen是不及物动词，这显然是错误的。

如果选C或D，则是用which代替people这一人称，不符合语法规定。

只有选C才是正确的定语从句引导词。这时句子变为：the people to whom this happens. 句子原型就是：this happens to the people.语法上完全正确。

词组是“sth. happen to sb.”“sb.”用宾格。“people”后为定语修饰people

这里面有个定语从句 people是先行词 __ this happens 整个是people的定语 定语从句中 不及物动词应该加介词 如look +at listen + to等happen 也是不及物动词 所以应加to people是人用whom引导 所以选B
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