口译笔译考试

【单选题】 Over a very large number of trials, the probability of an event ________is equal to the probability that it will not occur.
A．occurring
B．occurred
C．occurs
D．occur

网考网参考答案：A
网考网解析：
固定搭配。分词作定语修饰event，由于表主动，所以用现在分词。 查看试题解析出处>>