高中英语语法题3道1.------ is ----- the students to find out the mean

高中英语语法题3道
1.______ is _____ the students to find out the meaning and the usage of new words.
\x05　　A.What a dictionary does; help B.What dictionary does; to help
\x05　　C.How a dictionary does; help D.All that a dictionary does; helps
2.The teacher as well as her students _____ to visit the Moter Company tomorrow.
\x05　　A.go B.are to go C.is to go D.is about to go.
3.The building is _____.
\x05　　A.twenty-metre-high B.twenty metre high
\x05　　C.twenty-metres-high D.twenty metres high
求讨论