问题
选择题
Nowadays the roles of husband and wife are not as ______ defined as before, especially when both parents work and earn money for the family.
A．clear
B．clearer
C．clearly
D．more clearly
答案
答案：C
as…as…之间要用原级，故先排除B和D；又由于此处defined是动词，它要用副词来修饰，故C正确。