问题描述：
问英文语法题
Tom ___better than to ask Dick for help.
A should have known B shouldn't know C has known D shall konw
谁可以帮我解释一下这一题,怎样分析,
Tom ___better than to ask Dick for help.
A should have known B shouldn't know C has known D shall konw
谁可以帮我解释一下这一题,怎样分析,
问题解答：
我来补答展开全文阅读