问题
选择题
There are many kinds of birds in Australia, and over 140 species of snakes, ______are extremely dangerous.
A．many of those
B．many of that
C．many of which
D．many of what
答案
答案：C
考查非限制性定语从句，先行词是snakes，用many of which引导定语从句，句意是：在澳大利亚有很多种鸟，和140多种蛇，其中很多是很危险的。选C。