注意：此页面搜索的是所有试题
题目内容
（国家开放大学英语语法）
It is well __________ the effort tolearn howto do it.What are the incorrect choices.
A.worth making
B.worth to make
C.worth makes
D.worth of making
A.worth making
B.worth to make
C.worth makes
D.worth of making
参考答案
