分类：教育/科学-外语学习-英语考试
问题：128.______iswhatshewantstoknow.a? 
128. ______ is what she wants to know.a. Who to do       b. Whom to do itc. Who does it do    d. Whom doing it
回答：a。 to do 这里表示的是一种将要，a