问题
单项选择题
To be elected to the Senate a person must ______.
A．be at least 25 years old
B．be at least 30 years old
C．have been a citizen for seven years
D．be a lawyer
答案
参考答案：B
解析：[分析] 细节题型。 参看第三段第一句话...a senator must be at least 30 years old。
