自考《英语（一）》试题练习：固定词组（11.13）
单选题
[2004.10]Sometimes very young children have trouble ___ the right from the wrong.
A.for separating
B.to separate
C.having separated
D.separating
单选题
[2004.10]Sometimes very young children have trouble ___ the right from the wrong.
A.for separating
B.to separate
C.having separated
D.separating
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