The problem is ______ for us to work out．A.enough easyB.easy enoughC.so easyD.such easy
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B解析解题指导：enough修饰副词或形容词须放在其后。
如：My brother is old enough to dress himself．我弟弟足够大，可以自己穿衣服了。
He ran fast enough to catch up with the other runners．他跑得足够快，能够赶上其它运动员。
so easy常跟that从句。