australia is very large,but _____ its land is sand. A: all of B: much of选哪个?为什么?

australia is very large,but _____ its land is sand. A: all of B: much of选哪个?为什么?
australia is very large,but _____ its land is sand.
A: all of B: much of
选哪个?为什么?

australia is very large,but _____ its land is sand. A: all of B: much of选哪个?为什么?
B啊,A就成了说澳大利亚的土地全是沙子了,明显不是,B的意思是澳大利亚的土地大部分是沙子

australia is very large,but __B___ its land is sand.
A: all of B: much of
澳大利亚很大，但是大部分土地都是沙漠。