问题
选择题
Most volunteers are from universities, _________ it is not uncommon to see middle and primary school students too.
A．though
B．however
C．since
D．even if
答案
答案：A
题目分析：句意：尽管普遍可以看到中学生和小学生，但是大多数志愿者来自于大学。Though尽管；however不管怎样；since自从；even if即使，选A。